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Cosmograph Daytona Rolex

The Rolex chronograph born on the racetrack. History, references and specs.

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Datejust Rolex

The first self-winding waterproof wristwatch with a date window - and the reference Rolex.

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Submariner Rolex

The 1953 Rolex diver. James Bond's watch and the template every dive watch copies.

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Hans Wilsdorf

Founder of Rolex (1905) and Tudor (1946). Invented the Oyster case and the Perpetual rotor.

The Dirty Dozen Watches As Interpreted By Half A Dozen Affordable Microbrands Fratello
Audemars Piguet Dec 29, 2024

The Dirty Dozen Watches As Interpreted By Half A Dozen Affordable Microbrands

We often hear statements like, “This watch is a true classic,” or “This is a timeless design.” Typically, such statements refer to big names in the watch industry, such as Rolex and the Submariner, Omega and the Speedmaster, or Audemars Piguet and the Royal Oak. That’s either because their designs are simple and indeed timeless […] Visit The Dirty Dozen Watches As Interpreted By Half A Dozen Affordable Microbrands to read the full article.

Year in Review: Eight Predictions for 2025 SJX Watches
Vacheron Constantin VC will all mark Dec 26, 2024

Year in Review: Eight Predictions for 2025

Twenty twenty-five will be shaped by several factors, ranging from major anniversaries for a trio of important high horology brands, to economic reality where the slowdown in demand will reshape retail channels (and already led one watch brand to go bust). And the coming year will also see the still-unknowable Rolex strategy unfold, which might happen under the radar but will definitely be interesting. Big watches for a big year Next year will be a milestone for trio of important brands. Audemars Piguet (AP), Breguet, and Vacheron Constantin (VC) will all mark significant anniversaries: 150 years at AP, 250 years of Breguet, and 270 years for VC. This implies some major timepieces or even mechanical objects are on the way. Such watches are practically convention as landmark anniversaries are often platforms for brands to launch major watches. Some of the most complicated watches in contemporary watchmaking were anniversary creations – Patek Philippe marked 150 years with the Calibre 89, and then 175 years with the Grandmaster Chime. The Patek Philippe Calibre 89 launched in 1989 for its 150th anniversary. Image – Patek Philippe Museum In 2005, when VC marked its 250th year, it launched the Tour de l’Ile, which was the most complicated wristwatch in the world at the time, and also the most expensive wristwatch sold at auction that year. With that in mind, VC might be working on something that lives up to its status as a maker of haute horlogerie complications. The Vac...

The Seiko Dress Watch Of The Yar Teddy Baldassarre
Seiko Dec 12, 2024

The Seiko Dress Watch Of The Yar

As someone who typically leans towards the toolish side of Seiko’s offerings, there was something about the watch I bring you today which stopped me in my tracks for an inexplicable reason. Perhaps it is explicable (perhaps in real time while writing this) and I may figure out a way to explic...I mean, explain it. Yes, I am coming to you to introduce a new Seiko Presage Classic model. It is called the SPB478J1, and I think it just might be the attainable dress watch of the year. Okay, taking a step back for a moment, I am a Rolex guy and a two-tone guy. I regularly wear a two-tone Rolex Datejust on a jubilee bracelet so I certainly have a type. And you can see from looking at this watch, the Seiko SPB478J1, that it fits nicely into this category for me. Getting my biases out of the way, let’s dig into the watch. So Seiko, as we know, calls its watches by their reference numbers. But it also gave this one a nice little descriptor on the website: Delicate Cream Silk. I mean, come on, that’s amazing. It’s almost like it could be the alternative name of a band consisting of Bruno Mars and Anderson Paak. The name actually refers to the watch’s dial because, of course it does. The dial texture is “inspired by unbleached natural Japanese silk, a material which has long featured in Japanese home décor and clothing since ancient times.” The brand calls this a ‘Shiro-Iro’ colored dial.  Moving to the watch itself, it features gold-colored accents for a mixed-met...

Zenith Looks to the Jungle for a Wild New Limited Edition Defy Extreme Worn & Wound
Zenith Looks Dec 3, 2024

Zenith Looks to the Jungle for a Wild New Limited Edition Defy Extreme

One of my favorite pastimes within the world of watch enthusiasm is to tell anyone who will listen that the “Leopard” Rolex Daytona is my favorite version of the storied chronograph. When the Daytona comes up in conversation (and it does, a lot) I’m always ready to share that the intricate gem and diamond set version inspired by leopard prints and favored by Nicolas Cage is my favorite example. This assertion is only half a joke – I really do admire craftsmanship inherent in these watches (which is somewhat uncommon for Rolex) but mostly I like that the watch exists as a transgressive alternative to the norm. And what better way to do that than with a watch inspired by big cats and the jungle? The new Zenith Defy Extreme Jungle, a watch which immediately made me think of my favorite Daytona, knows that there is, in fact, no better way to gently push on the expectations of the typical watch enthusiast.  There’s an important distinction to be made between this new watch from Zenith and the Daytona, and that’s that the Leopard Daytona is, in every way, an outlier in the Daytona collection and for Rolex as a whole. The Zenith Defy Extreme, and the Defy line more generally, are made up almost entirely of outliers. In other words, it’s not actually that strange to see a jungle inspired Defy Extreme when we’ve already seen high concept Defys taking on various themes over the course of many years. This isn’t even the first time Zenith has played with the “jung...

Hands-On: Seiko's Best GMT Just Got More Colorful Teddy Baldassarre
Seiko Nov 29, 2024

Hands-On: Seiko's Best GMT Just Got More Colorful

The Seiko SSK GMT line has slowly taken the watch world by storm, and Seiko took the SKX-style format this year and updated it with a trio of new dial formats. Earlier this year, I wrote a story on what – at the time – was every single existing SKX-style Seiko SSK GMT on the market, but that story is officially out of date. Before I get any further into this, it makes sense to establish a few things about these watches. First, they were released in 2022, creating a new wave of GMT affordability in the watch world. Why do I keep calling them SKX-style watches? Well, because the case profile is nearly identical to that of the now-discontinued icon, the Seiko SKX. The Seiko SSK001 and 003 models (the blue- and black-dial versions) are watches that I often suggest to anyone looking for a true "everyday" attainable watch. I even chose it in a video I did with Teddy where we both were tasked with building a collection under $7,000 ( let me know if you think I won). But enough lede-burying. Let’s get to the newness. In total there were three new variations released: The SSK033 with a blue and black bezel, the SSK035 with a green dial and bezel format, and the SSK036, which brings a black/brown aesthetic to the mix with a leather strap (the other two come on Jubilee-style bracelets). So let’s start with the SSK033. As an owner of the Rolex GMT-Master II with the blue-and-black bezel, I immediately zeroed in on this one. But where this clearly differs from the Rolex in term...

Hands-On: the Dennison ALD Collection Worn & Wound
Zenith Nov 25, 2024

Hands-On: the Dennison ALD Collection

Watch history is often the story of unsung heroes. Zenith is commonly credited as the creator of the first automatic chronograph, while their collaborator Movado is often a footnote, if mentioned at all. The Omega Speedmaster, famously the first watch worn on the moon, gets most of the street cred when discussing out-of-this-world watches. However, any mention of the actual first watch worn in space, the Sturmanskie, is a deep cut rarely discussed. Mid-century watch cases tend to follow the same trend. While brands like Rolex, IWC and Zenith were busy becoming household names, the third party manufacturers making the cases of their renowned classics worked diligently in the shadows. One such case designer and manufacturer was Dennison, a brand you may never have heard of, but undoubtedly handled if you are a fan of vintage luxury Swiss watches. Founded in 1874 by Aaron Lufkin Dennison (who the ALD collection is named after), Dennison became a powerhouse of both design forward and spec focused watch cases. Their patented air and water tight cases could be found on the wrists of members of the British Military, housed the famous Smith dials that submitted Everest in 1953 and even accompanied Lt. Commander Lithgow when he broke the world air speed record. Dennison went dormant after the 1960’s and, like many other once-defunct brands that followed suit with the emergence of the quartz crisis, has risen from the ashes. Resurrection stories can be hit and miss, leading many e...

Unique Tudor Black Bay Ceramic for Las Vegas Grand Prix SJX Watches
Tudor Black Bay Ceramic Nov 24, 2024

Unique Tudor Black Bay Ceramic for Las Vegas Grand Prix

Building upon the Black Bay Ceramic “Chameleon” made just for the Miami Grand Prix in May, Tudor just unveiled the Black Bay Ceramic in green-blue livery, which will be worn by drivers Yuki Tsunoda and Liam Lawson of the Visa Cash App RB Formula One Team (VCARB) during the Formula 1 Las Vegas Grand Prix. Inspired by the glittering lights and colours of the Las Vegas strip that hosts the circuit, the one-off Black Bay Ceramic a speckled, graduated green-blue dial paired with a matching strap. Initial thoughts Since the announcement of the partnership between Tudor and the VCARB Formula 1 Team, the watchmaker has already unveiled several VCARB editions. The Las Vegas and Miami race editions are more striking and unusual, but unfortunately only issued to the team drivers for the race. Regular folk will have to make do with the Black Bay Ceramic VCARB that’s available in stores and good value, but not quite as unique. While it might seem that that special editions from Tudor are many, the brand’s collaborative watches mirrors the approach taken by Rolex decades ago, when the Geneva giant made watches for various professionals. Besides VCARB, Tudor has made watches for French navy aviators, the Alinghi America’s Cup team, and reputedly the US Navy’s elite SEALs. The colours of the Strip The dial and strap feature a green-blue finish modelled by the VCARB livery for the Las Vegas Grand Prix, which is in turn inspired by the reflected lights of the Las Vegas Strip. As...

Serica’s Parade is the Brand’s Most Ambitious Watch to Date Worn & Wound
Serica s Parade Nov 21, 2024

Serica’s Parade is the Brand’s Most Ambitious Watch to Date

Nearly a year ago I sat in on a conference call with some colleagues and members of the Serica team, who outlined their upcoming slate of 2024 releases. They were particularly excited about a new watch they weren’t yet ready to show us that would debut toward the end of the year, a watch they claimed was a significant departure for them in terms of style, shape, and what enthusiasts have come to expect from Serica over the last five years. While not an anniversary piece, per se, they framed this release as one that celebrates the brand and their unique perspective on the watch world, and now, finally, having seen the new Reference 1174 Parade, their excitement makes a lot of sense. This is an ambitious release, and should go a long way in expanding what the community might expect from Serica going forward.  Serica has built their brand on designing purpose built but elegant tool watches in the style of classics from the midcentury period made by Rolex and countless other historic brands. Their watches tend to have a very clear vintage influence without being too on the nose – they never mimic or borrow completely from any specific classic watch. The same holds true for their first watch in a more formal vernacular. The Parade jumps in the shaped case arms race with a dramatic oval, stepped case in what the brand calls a “Stadium” footprint: straight sides, but with soft, curved corners that suggest both roundness and length simultaneously.  The watch might immedi...

Fast Cars, Street Racing, Las Vegas and the TAG Heuer Monaco Chronograph in Pink Worn & Wound
Louis Vuitton trophy cases Having established Nov 20, 2024

Fast Cars, Street Racing, Las Vegas and the TAG Heuer Monaco Chronograph in Pink

On November 24th, the weekend before Thanksgiving, the Las Vegas strip comes alive with the Formula One World Championship. Street circuits have a different vibe to them than the purpose-built racetracks. Especially in Vegas, the parties and excitement are next level. High rollers are comped with luxury suites, as they watch the drivers navigate the myriads of casinos at high speed on the notoriously traffic jammed streets of the Vegas strip. Enter TAG Heuer, with a pink Monaco chronograph in a DLC-coated titanium case. In my opinion, it is a perfect symbolic watch for Vegas night street racing – delivering the big wrist presence energy.  Last month Formula One and LVMH signed a ten-year partnership deal worth a billion dollars. TAG Heuer, owned by LVMH, is already a sponsor of the Red Bull Racing team and the Monaco GP. With Rolex now no longer a sponsor, TAG Heuer could possibly become the face of Formula One beginning next season. You can already see the presence of LVMH’s core luxury brands at the races, with bottles of Moët on the podium and monogrammed Louis Vuitton trophy cases. Having established that LVMH has beaucoup bucks, let’s move on to discussing the Monaco chronograph. If you remove the pink elements from this Monaco, it is a serious and technical piece. But the pink makes it more fun and commands the spotlight. I may as well be describing the Formula One drivers.  TAG Heuer has a similar watch in their current catalog with blue and yellow accents,...

[VIDEO] Hands-On Impressions of the Tudor FXD GMT “Zulu Time” Worn & Wound
Tudor FXD GMT “Zulu Time” Nov 20, 2024

[VIDEO] Hands-On Impressions of the Tudor FXD GMT “Zulu Time”

It’s been just a few weeks since the release of the Tudor Pelagos FXD GMT, and if one thing is already clear, this latest addition to the FXD lineup is a hit. I already personally know a handful of people who have picked one up, and even if I didn’t, I’ve seen enough wrist shots on Instagram to know that this is going to be an exceedingly popular watch across the board and is likely Tudor’s most successful new release of the year (no small feat considering the consistency and quality of their 2024 releases). The Tudor Pelagos FXD GMT is also probably the most surprising Tudor release of the year, not because we didn’t expect some version of this to hit the catalog eventually, but because of just how closely Tudor has hewn to the theoretical watch so many collectors have been clamoring for. It’s exceedingly rare for either Tudor or Rolex to give enthusiasts exactly what they’ve been asking for, but with the Pelagos FXD GMT, they’ve done just that. So with all that in mind, I went down to my local AD to spend some hands-on time with Tudor’s latest and greatest. I came away from that visit with two clear thoughts cemented in my mind. The first is that the Tudor Pelagos FXD GMT is, without a doubt, the objectively best GMT to come out of either Rolex or Tudor, ever. The second is that I have absolutely no interest in owning one, at least not yet. On paper, the FXD GMT is everything you could want from a Tudor GMT. Here we have an FXD (already possibly the coo...

The Evergreens – An Extensive Look at the Entire Tudor Black Bay Lineage from 2012 to 2024 Monochrome
Tudor Black Bay Lineage from Nov 8, 2024

The Evergreens – An Extensive Look at the Entire Tudor Black Bay Lineage from 2012 to 2024

It is pretty impressive to see how Tudor’s Black Bay models have established themselves as more accessible options to the Rolex Submariner in a relatively short period of time without compromising on quality. But more than just being a more accessible Submariner, the Black Bay has gained its own status over the years, becoming an […]

Hands-On: the Fleux FLX003 Worn & Wound
Panerai Nov 4, 2024

Hands-On: the Fleux FLX003

Search for “vintage watch” on Kickstarter and you’ll be met with page after page of watches that seek to capture the charm of watches from decades past. Some will be near-replicas that look more like carbon copies than modern interpretations. Others will find a balance of paying homage to iconic designs while still maintaining an air of originality. While the approaches vary, vintage inspired designs remain pervasive – they’re just about everywhere. Last year, Toronto based Fleux joined the ranks of brands crowdfunding their vintage inspired freshman releases with the FLX001 and FLX002– taking the amalgamation route by drawing inspiration from a variety of classic skin divers. The FLX001 featured chunky lume plots and a blocky orange hour hand that brought to mind images of Squale and Vulcain. The FLX002 featured a California dial, a layout of half Roman and half Arabic numerals that was popularized by brands like Rolex and Panerai. Changing gears to pay homage to a single watch rather than a genre, the FLX003 unapologetically draws its inspiration from the Omega Seamaster 300 Big Triangle- also known as the “Big T”. The Watch Lets address the elephant in the room: When considering a $500 NH38 powered Omega inspired dive watch, it’s fair to ask how it differs from the other Omega-inspired designs on the market. Afterall, a 200 meter, Seiko powered watch from Pagani Design can be yours for about $100. I’ve personally owned (and worn with pride) many of t...

Introducing – The Return of the Triton Spirotechnique Dive Watch Monochrome
Blancpain Fifty Fathoms Oct 29, 2024

Introducing – The Return of the Triton Spirotechnique Dive Watch

While the Rolex Submariner, Blancpain Fifty Fathoms and Omega Seamaster ruled the 1950s enthusiast and military diving scene, it was the Triton Spirotechnique in 1963 that briefly became the most expensive dive watch of its times, although never the best known. It was developed for the Spirotechnique company (Aqualung), founded by oceanographer/filmmaker/French naval officer Jacques […]

REVIEW: Hands On With The TAG Heuer Carrera Chronograph Extreme Sport WatchAdvice
TAG Heuer Carrera Chronograph Extreme Sport Oct 20, 2024

REVIEW: Hands On With The TAG Heuer Carrera Chronograph Extreme Sport

The TAG Heuer Carrera Chronograph Extreme Sport is a piece that isn’t for the faint of heart, and is aimed squarely at those who appreciate motorsport – so we thought we would test drive this in the real world to see how it performs. What We Love: The bold design elements The rose gold case paired with the black accents Super comfortable piece to wear What We Don’t: The 44mm size won’t suit all wrist sizes Lack of a screw-down crown on a sports piece Lack of detailing and design on the rubber strap Overall Rating: 8.5/10 Value for Money: 9/10 Wearability: 8.5/10 Design: 8.5/10 Build Quality: 8/10 TAG Heuer’s motorsport roots are well-known, to the point where if you don’t associate TAG Heuer with motorsport, then I’d say that you’re probably also unaware of the brand. Ok, I’m being a little facetious here, but you get my point. The fact that they have a watch named after an F1 race (The Monaco) and another that was designed in 1963 after Jack Heuer was enamoured by the Carrera Panamericana race in Mexico (The Carrera) should give this away, but also highlights the brand’s close ties with motor racing. This is no more evidenced by the fact that TAG Heuer will be taking over from Rolex as the official timing partner for Formula 1 from 2025 for the next 10 years as part of the deal between Formula 1 and LVMH. Global Luxury Giant LVMH Inks A Historic 10-Year Deal With Formula 1 So it comes as no surprise that last month in early September, TAG Heuer lau...

Introducing – A New Trio of Amber-Toned H. Moser & Cie. Exclusive Creations for Bucherer Monochrome
H. Moser & Cie Exclusive Creations Oct 8, 2024

Introducing – A New Trio of Amber-Toned H. Moser & Cie. Exclusive Creations for Bucherer

Bucherer, the world’s leading watch retailer that recently made headlines when Rolex acquired it, has a history of collaborating with various brands to release exclusive editions, and one signature colour has consistently defined these partnerships – Bucherer Blue. Last year, this theme was showcased in a trio of remarkable timepieces from H. Moser & Cie […]

Owner's Review: The Serica 5303-3 COSC Diving Chronometer Is Parisian Teddy Baldassarre
Serica Oct 4, 2024

Owner's Review: The Serica 5303-3 COSC Diving Chronometer Is Parisian

Picture the scene: a hectic work week ends with a quick bite at your favorite Italian trattoria, then you hustle a few blocks afterwards to a dimly lit West Village jazz club to catch a blazing first set from the house band. Glancing down at your wrist, you see you have just enough time to cab it to the airport for the redeye to Paris for a well-deserved long weekend, beachfront on the Côte d'Azur. But the watch on your wrist isn’t a vintage Rolex GMT-Master or Omega Seamaster 300, although either would be a fine choice to segue from the office to the French Riviera without missing a beat. No, your timepiece is from Serica, a microbrand based in France with enough Continental cool and midcentury charm to appear as if it just popped out of a time capsule from 1962. If ever a modern sports watch evoked the Mad Men era, this is it. Even though it’s only been in existence since 2019, Serica doesn't feel like a typical microbrand. In fact, it has the aura of an established horological icon, one with its own storied history and visual language. And if it’s not readily apparent, I’m positively obsessed with the entire Serica aesthetic.  Serica's French-designed, Swiss-made creations blend the refinement of classic Parisian fashion with the urbane cool of a European matinee idol. The company’s debut release was the W.W.W field watch, followed by the 5303 diver that made its bow in 2021, in both black and white-dialed variants. A new colorway was offered the followin...

Fratello’s Top 5 Vintage Tudor References Fratello
Tudor References Another Friday another Oct 4, 2024

Fratello’s Top 5 Vintage Tudor References

Another Friday, another list! Last week, we looked at the rarest Rolex Submariner references. This week, we have shifted our focus to Tudor. We decided to have a look at our favorite five vintage Tudor references. Most people will know the classic Submariner models, but there is plenty more to enjoy from the Tudor brand. […] Visit Fratello’s Top 5 Vintage Tudor References to read the full article.

It’s Official: LVMH is a Formula 1 Sponsor Starting 2025 SJX Watches
Louis Vuitton TAG Heuer Oct 3, 2024

It’s Official: LVMH is a Formula 1 Sponsor Starting 2025

Having been a fait accompli since the summer, LVMH is now a key sponsor of Formula 1. Starting in 2025, the 10-year sponsorship deal will see the French luxury group become a top-level sponsor of F1. Several LVMH brands will be part of the sponsorship, including Louis Vuitton, TAG Heuer, and its drinks division Moët Hennessy that owns champagne makers like Moët & Chandon. Coming just after Louis Vuitton’s high-profile presence at the 2024 Paris Olympics, the F1 sponsorship deepens the group’s involvement in sports and popular culture. Spearheaded by Frederic Arnault, the head of LVMH Watches, the deal is worth about €100 million annually according to an LVMH insider. “For many years, several of our Maisons have also chosen to invest in Formula 1…”, said Mr Arnault, “We want to further grow this experiential dimension that Formula 1 provides all over the world.” From left to right: Stefano Domenicali, President & CEO of Formula 1; Greg Maffei, President & CEO, Liberty Media; Bernard Arnault, Chairman & CEO, LVMH Group; and Frédéric Arnault, CEO, LVMH Watches LVMH takes the place of Rolex as a “Global Partner” of Formula 1, the highest-level of sponsorship, putting the group alongside Amazon and Aramco. The deal was sealed as Formula 1’s owner, American entertainment giant Liberty Media, has successfully grown F1 beyond its traditional audience with new race locations like Las Vegas, a hit Netflix reality series, and an upcoming movie starring Brad...

Insight: The Advantages of a Vertical Clutch Chronograph SJX Watches
Breitling B01 Oct 2, 2024

Insight: The Advantages of a Vertical Clutch Chronograph

The vertical clutch has become the de facto standard in modern chronograph movements thanks to its mechanical and practical benefits. The widespread and varied use of the vertical clutch is illustrated by the many recent movements that employ the mechanism, ranging from the Rolex Cosmograph Daytona to the Breitling B01 to the MB&F; LM Sequential Evo. The proliferation of the vertical clutch is easily explained by its merits. Having explained the construction of a vertical clutch, we now turn to its advantages over the traditional horizontal clutch (or lateral coupling). Figure 1: A simplified cross section of a vertical clutch A vertical clutch serves to transfer energy from the going train of the movement to the chronograph going train, accomplishing this via a vertical motion. Figure 1 illustrates its key parts: a flywheel (yellow) geared to (or even part of) the going train; a cone (grey) that is linked to the chronograph seconds mobile, and vertically tensioned by a spring (red); a pair of pincers (blue) that engage with the cone, lifting or lowering the cone.  When the cone is raised and engaged with flywheel, the chronograph starts running, and when the cone drops and disengages, the chronograph stops. One of the most apparent advantage of the vertical clutch is the low kinetic friction generated during coupling and uncoupling of the chronograph, as friction is produced only by the sliding motion of the pincers and the vertical motion of the cone. The Rolex Cosmogra...

The Tudor Prince Oysterdate “Jumbo” Is A Vintage Value Proposition Fratello
Tudor Prince Oysterdate “Jumbo” Sep 29, 2024

The Tudor Prince Oysterdate “Jumbo” Is A Vintage Value Proposition

I am a big fan of vintage Tudor, as many of you will probably already know. Tudor, to me, is a brand that represents the very best of Hans Wilsdorf’s vision of creating mechanical excellence but without the posh baggage of Rolex. The vintage Tudor Prince Oysterdate “Jumbo” will scratch the Datejust itch but with […] Visit The Tudor Prince Oysterdate “Jumbo” Is A Vintage Value Proposition to read the full article.

Explained: The Vertical Clutch of a Chronograph SJX Watches
Audemars Piguet Royal Oak Chronograph Sep 20, 2024

Explained: The Vertical Clutch of a Chronograph

Having already explained the more traditional horizontal clutch (or lateral coupling), we now look forward to the more modern vertical clutch. This is found in some of the most famous chronographs in contemporary watchmaking, including the Rolex Daytona with the cal. 4131 (pictured above), Patek Philippe Nautilus with the CH 28-520, and Audemars Piguet Royal Oak Chronograph with the cal. 4401. Arguably the most advanced type of chronograph coupling mechanism, the vertical clutch as it is known today was debuted in 1969 by Seiko in the 6139 chronograph. But the concept can be found in late 19th century pocket watches, and even the inexpensive Pierce Chronographe of the 1930s. Today it is practically the default choice for new chronograph constructions. Equipped with the vertical clutch, the Patek Philippe CH 28-520 in the Nautilus Travel Time Chronograph ref. 5990/1A Like its horizontal counterpart, the vertical clutch serves as the mechanical link between the chronograph mechanism and the going train of a movement, allowing power to flow from the going train to the chronograph, which then allows the chronograph to run. While it fulfils the same function, a vertical clutch works differently from the horizontal equivalent, a distinction that comes with its own set of advantages and disadvantages. How it works A chronograph vertical clutch is similar to the clutch found in the manual transmission of some automobiles. The clutch of an automobile enables the intermittent connec...