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El Primero Zenith

The 1969 36,000 vph automatic chronograph saved from the quartz crisis by Charles Vermot.

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El Primero Zenith

Zenith's 1969 column-wheel automatic chronograph caliber at 36,000 vph, saved from quartz-era destruction by Charles Vermot in 1975 and supplied to the Rolex Daytona ref. 16520 (1988-2000).

Introducing – The Zenith x Revolution Chronomaster Revival A3818 Cover Girl Carbon Monochrome
Zenith x Revolution Chronomaster Revival Feb 7, 2025

Introducing – The Zenith x Revolution Chronomaster Revival A3818 Cover Girl Carbon

Back in 2020, watch magazine Revolution introduced its first limited edition Zenith Chronomaster Revival, a watch with a bold dial layout inspired by a 1971 version of the legendary El Primero nicknamed the A3818 “Cover Girl”. This first edition was made in steel and was followed in 2022 by the Chronomaster Revival A3818 “Airweight Cover Girl” in […]

Introducing: The Zenith × Revolution Chronomaster Revival A3818 “Cover Girl Carbon” Fratello
Zenith × Revolution Chronomaster Revival Feb 7, 2025

Introducing: The Zenith × Revolution Chronomaster Revival A3818 “Cover Girl Carbon”

It’s no secret that I adore the classic Zenith El Primero A384 and all of its vintage and modern descendants. One of the most famous is the brilliant El Primero A3818 “Cover Girl” that graced the cover of Manfred Rössler’s popular Zenith book from 2009. The vintage blue-dial A3818 is an absolute beauty and has […] Visit Introducing: The Zenith × Revolution Chronomaster Revival A3818 “Cover Girl Carbon” to read the full article.

Zenith Skeletonises the Defy Skyline Chronograph SJX Watches
Audemars Piguet Jan 21, 2025

Zenith Skeletonises the Defy Skyline Chronograph

Zenith’s latest release is an evolutionary take on its popular sports chronograph with an integrated bracelet: the Defy Skyline Chronograph Skeleton builds upon the original version by open working the dial and main plate of the El Primero calibre. The dial is skeletonised to form a star, Zenith’s longtime emblem and a recurring theme of its skeleton watches. Apart from the open-worked dial, the new Defy remains essentially unchanged from the standard model, keeping the same 42 mm octagonal case topped by a 12-sided bezel. Initial thoughts Zenith’s El Primero was a milestone as one of the first automatic chronograph calibres. The new Defy is equipped with the second-generation El Primero, the cal. 3600, which is one of the biggest strengths of the watch. Notably, the movement has a lightning chronograph seconds completing a full revolution every 10 seconds, allowing the chronograph to measure up to 1/10th of a second (if your fingers work the pushers fast enough). That said, the watch does feel a little derivative in terms of design. While the look is not particularly creative or original, it nonetheless presents a visually striking aesthetic. The combination of satin-brushed and polished surfaces on the case and bracelet are done well. Compared to other watches it resembles (from the likes of Audemars Piguet and Hublot), the Defy is arguably better value. Priced at US$15,500, the Defy Skyline Chronograph Skeleton is one of Zenith’s pricier offerings, but arguably...

Hublot Unveils this Year’s Lunar New Year Limited Edition Spirit of Big Bang Worn & Wound
Hublot Unveils Jan 8, 2025

Hublot Unveils this Year’s Lunar New Year Limited Edition Spirit of Big Bang

2025 is the year of the snake in China, and Hublot has been creating special limited releases for the Chinese New Year since 2016. This year’s rendition, which has traditionally been implemented on Hublot’s Spirit of Big Bang has just been announced, and you and I both know, before even seeing images of the new watch – that there’s going to be a snake on it somewhere.  By looking at the press images of this watch, it’s quite apparent that the snake theme is in the forefront of the design. It’s cleverly integrated into the serpent like shape of the sub-dial’s borders, which are entirely adjoined in gold plated fashion and flow effortlessly into each other.   The snake theme doesn’t stop there, but actually continues on both the bezel and the rubber strap with the integration of a scale like engraving. While the year-end theme of the watch is a big attraction that will initially draw you in, the details of the high horology watchmaking is what’s really going to keep you intrigued. The watch case is fully ceramic and the bezel has been screwed down with visible screws. The watch also features a fully open dial setting, showing off the inner workings of chronograph calibre HUB4700, which is actually based on an original El Primero chronograph movement from 1969, of course with this modified variant having some upgrades such as the low friction silicon escape wheel.  The watch is priced at $35,100, but is limited to a tiny production volume of 88 pieces. T...

Introducing – Longines’ First Carbon Watch, The Ultra-Chron Carbon Monochrome
Longines First Carbon Watch Jan 1, 2025

Introducing – Longines’ First Carbon Watch, The Ultra-Chron Carbon

Everyone is familiar with Zenith’s high-frequency El Primero automatic chronograph movement, released in 1969. However, not everybody is familiar with the world’s first high-frequency diver. The laurels, in this case, go to Longines with its 1968 Ultra-Chron ref. 7970 with a 5Hz frequency and a depth rating of 200m. Reintroduced in 2022, the Ultra-Chron returns […]

Insight: The Modern Performance Chronograph Movement SJX Watches
Vacheron Constantin has Dec 10, 2024

Insight: The Modern Performance Chronograph Movement

High-end chronograph movements of today tend to have in common a vertical clutch and column wheel. Such “performance” chronographs are typically also automatic, and practically every high-end watchmaker, from Audemars Piguet to Vacheron Constantin, has its own take on the modern “performance” chronograph. The chronograph movement as we know it today is actually a fairly recent invention. Despite being common in today’s chronograph constructions, the vertical coupling, or at least its concept, is decades-old. The Pierce cal. 130/134 launched in the 1930s is regarded as the first commercially available wristwatch with a vertical clutch. There are examples of even older stopwatches that relied on crude forms of the vertical clutch, but most were either prototypes or small-batch production. But the large-scale use of the vertical clutch only started in the late 1960s, when Seiko debuted the cal. 6139. Launched in 1969, the Seiko cal. 6139 was a vertical clutch movement produced on an industrial scale. Not only was it among the first-ever automatic chronographs, but the cal. 6139 also was objectively the most advanced amongst them. Compared to the modular construction of the Breitling-Heuer Chronomatic Caliber 11 and the fairly classical architecture of the Zenith El Primero, the Seiko cal. 6139 was endowed with a vertical clutch and a novel construction all around. It was, however, an industrial, no-frills movement at heart. The one that started it all – the cal. ...

Zenith’s 1/100th Second Chronograph Inlaid with Tiger’s Eye SJX Watches
Zenith s 1/100th Second Chronograph Dec 10, 2024

Zenith’s 1/100th Second Chronograph Inlaid with Tiger’s Eye

Zenith has given its 1/100th-of-a-second El Primero 21 an unusual attire – pusher protectors and a dodecagonal bezel in tiger’s eye mineral stone. Matched with a dial featuring tiger stripes and green accents, the Defy Extreme Jungle retains the trademark double balance wheels of the model. The movement features a conventional timekeeping balance operating at 36,000 beats per hour (5 Hz), and a smaller regulator for the chronograph that beats 10 times as fast, 360,000 beats per hour or 50 Hz, enabling the chronograph to record times with a resolution of up to to 1/100th of a second. Initial thoughts I have long thought that the Defy Extreme was too similar to other, more famous oversized sports chronographs, that is, until I actually got to try on the Defy Extreme Jungle in person. The new Defy still evokes other designs, but it is finely executed, with the minerals stone inlay being notably well done. At the same time, the tiger’s eye elements add some originality to the design, so this easily stands out as the most interesting model in the Defy line. The tiger’s eye components, especially since they are prominently positioned, are likely more fragile than the same on the equivalent titanium model, but they add texture and colour so are arguably worth the sacrifice of practicality. At US$26,900, the Defy Extreme Jungle is pricier than the average Zenith chronograph, but still a reasonable proposition given the exotic material and 1/100th of a second movement. Tige...

Collective Horology and Zenith Collaborate on a Limited Edition Defy Skyline Worn & Wound
Zenith Collaborate Nov 19, 2024

Collective Horology and Zenith Collaborate on a Limited Edition Defy Skyline

Collective Horology, the Southern California based retailer of independent watches, has unveiled their most recent collaboration, their second with Zenith. The ​​Zenith Defy Skyline C.X follows the El Primero C.01, Collective’s very first limited edition which was released into a very different watch landscape in 2019. Collective has changed along with the watch industry – they’ve become a full fledged retailer of independent watch brands, and have nixed the “members only” concept that the company was born with. It’s fair to say that Collective’s scope has widened considerably since 2019: their goal seems to be spreading the gospel of independent watchmaking at a huge range of price points to anyone who will listen, while continuing to hone in on storytelling in their own limited edition releases to make each of them feel special in their own way.  The Skyline C.X takes the latest version of Zenith’s Defy Skyline and strips it back aesthetically to resemble an imagined version of what the watch might have been had it debuted in the 1970s when the Defy collection was beginning to take shape. The theme Collective and Zenith are playing with for this edition is that of midcentury industrial design. To that end, virtually every surface of the case (and bracelet) has been given a micro blasted finish for a sleek, industrial look, and the familiar star motif seen on most Skyline dials has been given a dramatic gradient effect, with the engraved stars appeari...

Video – A Closer Look at the Edgy Zenith Defy Revival A3648, Rekindling that 1969 ‘Everything is Possible’ Spirit Monochrome
Zenith Defy Revival A3648 Rekindling Nov 18, 2024

Video – A Closer Look at the Edgy Zenith Defy Revival A3648, Rekindling that 1969 ‘Everything is Possible’ Spirit

The year 1969 proved to be pivotal for Zenith. The manufacture introduced the El Primero automatic chronograph, which would become one of the most influential movements ever made. Besides that monumental feat, it also launched the formidable Defy collection that year. This sporty series of watches had an unprecedented design, with an octagonal case topped […]

First Look – A New Silver Dial for the Zenith Defy Extreme Diver (Incl. Video) Monochrome
Zenith Defy Extreme Diver Incl Nov 6, 2024

First Look – A New Silver Dial for the Zenith Defy Extreme Diver (Incl. Video)

Zenith stole the headlines in 1969 with the world’s first high-frequency automatic chronograph movement, aptly named ‘El Primero’. With less fanfare, Zenith also launched its heavy-duty Defy watch with an angular octagonal case, groovy orange bakelite bezel, and impressive water-resistance. Nicknamed the ‘vault’, the Defy Plongeur ref. 3648 was a monster of the abyss capable […]

Hands On: The First-Ever Rolex Daytona “Rainbow” 16599SAAEC SJX Watches
Zenith powered Daytona Nov 5, 2024

Hands On: The First-Ever Rolex Daytona “Rainbow” 16599SAAEC

One of the most valuable watches to go on the block this auction season is the Rolex Daytona “Rainbow” 16599SAAEC. Part of Phillips’ Reloaded auction taking place on November 8, 2024, the Zenith-powered Daytona is the original “Rainbow”, having been produced in 1994, some 18 years before the serially-produced Daytona “Rainbow” was introduced. Like all automatic Daytona models prior to 2000, this Daytona “Rainbow” is powered by the cal. 4030, which is a Zenith El Primero modified by Rolex. But this Daytona is unique in having a singular model reference of 16599 followed by the suffix “SAAEC”, short for saphir arc-en-ciel, French for “sapphire rainbow”. A rainbow history Though the Daytona “Rainbow” is perhaps the most famous gem-set Rolex model today, it took a while to catch on when it was introduced. It debuted as a regular production model in 2012 with the Daytona ref. 116598RBOW in yellow gold and ref. 116599RBOW in white gold. The Daytona ref. 116599RBOW in white gold At launch the Daytona “Rainbow” was not the object of frenzied desire as it is now, but by 2018 it was sought after. And that year Rolex debuted the Daytona ref. 116595RBOW in Everose gold that boasted the upgrade of baguette-cut rainbow indices. The facelift was also applied to the yellow and white gold versions, both of which now sport baguette-cut rainbow indices as well. As with the first generation model, variants with gem-set dials and bracelets also exist. The Day...

Zenith and Porter-Yoshida Pilot Watches in Green Ceramic SJX Watches
Zenith Oct 30, 2024

Zenith and Porter-Yoshida Pilot Watches in Green Ceramic

Porter, a Japanese cult brand famous for its functional nylon bags, has lent its signature colours to Zenith to create the Pilot Central Automatic Porter and the Pilot Big Date Flyback Chronograph Porter. The new Pilot duo retain the familiar aviation-inspired design, but in green with orange accents, including for the first time a case in khaki green ceramic. Both models are delivered with two straps: a conventional Cordura-effect rubber strap and a green nylon strap made by Porter. Initial thoughts While the Pilot Porter isn’t an iconic classic like Zenith’s El Primero, it is a unique take on the traditional aviator’s watch that is different but still functional, not unlike Porter bags that are popular for their no-frills quality. The green and orange livery is appealing and avoids the usual pilot’s watch look, but remains entirely legible and utilitarian. Priced at US$11,300 for the time-only variant and US$15,500 for the chronograph, the Pilot Porter is priced comparably to the equivalent regular-production Pilot models. Though both are more expensive than Zenith’s offerings in steel, they are priced reasonably enough considering the material and movement, as well as the competition. Khaki green Porter is the most famous label owned by Yoshida & Co., a Japanese maker of luggage and bags. Usually in dark-coloured nylon with contrast-colour lining, Porter bags are multi-pocketed and useful (and also quite pricey for nylon bags). The Pilot Porter models adopt th...

Zenith Chronomaster Revival Shadow Review Teddy Baldassarre
Zenith Oct 28, 2024

Zenith Chronomaster Revival Shadow Review

There are some watches that kind of stay with you. They may not be in your wheelhouse as far as taste is concerned (or at least what you think your taste is), but something about them just resonates. This is how I feel, and have felt, about the Zenith Chronomaster Revival Shadow, a watch that has been in production for some time, one that I have reviewed in the past, and one that I still do not own but which continues to take up valuable real estate in my brain.  The version of the watch that I got turned onto was the only one available until recently - a blasted-finish, black-coated titanium chronograph in the retro A384 case format that plays on the past but brings a decidedly modern design sensibility to the overall package. The dial is a matte, flat black and the text on it is well thought-out in terms of the vintage effect, down to the printing of the logos and numerals. It’s as if you’re looking at a museum artifact, except that it's packed with one of the best modern automatic chronograph movements in the game, Zenith's own El Primero, and at 37mm it fits perfectly on my 6.25-inch wrist. If you have been paying attention to Zenith over the past half-decade or so, you are sure to notice that the brand has done quite a job in balancing vintage revivals with innovative new releases. It’s the only brand I know that revives a watch and keeps everything true to form down to the clasp on a bracelet. I recall handling another Shadow model – the Defy Shadow ...

Zenith Introduces Defy Skyline Big Date Flyback Sincere Platinum Jubilee SJX Watches
Zenith Introduces Defy Skyline Big Oct 25, 2024

Zenith Introduces Defy Skyline Big Date Flyback Sincere Platinum Jubilee

For the Singapore retailer’s 70th anniversary, Zenith debuts the Defy Skyline Big Date Flyback Sincere Platinum Jubilee Edition. In a first for the model line, the limited edition combines a big date and flyback chronograph, while the case and integrated bracelet are in sandblasted titanium for a clean, monochromatic aesthetic. Initial thoughts Best known for the landmark El Primero high-frequency chronograph movement, Zenith also jumped on the fad for integrated-bracelet sports watches with the Defy Skyline. The angular case and polygonal bezel bring to mind other designs, but like other Zenith offerings, the Defy Skyline is appealing because it’s well priced and equipped with a solid movement. The Sincere Platinum Jubilee Edition is no exception. In fact, it’s one of the best looking iterations of the model with its all-grey look. Even though the colours are muted, this iteration of the Defy Skyline stands out. Priced at 22,200 Singapore dollars (about US$17,000), the Sincere edition is priced competitively for what you get, which includes an El Primero calibre with extra complications. El Primero The Sincere edition has the signature Defy Skyline design of a dodecagonal bezel, angular case with oversized pushers, and an integrated bracelet. The case and bracelet are sandblasted to a smooth matte finish, resulting in a striking, deep grey tone. The titanium case is 42 mm in diameter and 47.4 mm lug-to-lug. Despite the seemingly large case, the Defy Skyline is weara...

The Evergreens – The History of the ETA Unitas 6497 and 6498, the Ubiquitous and Robust Hand-Wound Calibre Monochrome
Sep 20, 2024

The Evergreens – The History of the ETA Unitas 6497 and 6498, the Ubiquitous and Robust Hand-Wound Calibre

How do a pair of manually wound, time-only, pocket watch-sized, potentially outdated movements introduced in the 1950s earn a place in our series on significant calibres, alongside the well-known El Primero and Valjoux 7750 chronograph calibre and the omnipresent automatic ETA 2824 and 2892? Several factors contribute to their importance. Despite seeming unusual today, the […]

Introducing – The New Zenith Defy Skyline Chronograph Boutique Edition Monochrome
Zenith Defy Skyline Chronograph Boutique Sep 11, 2024

Introducing – The New Zenith Defy Skyline Chronograph Boutique Edition

An important range for the brand, Zenith keeps enlarging its Defy collection. The name of the collection dates to Zenith’s 1902 line of robust pocket watches bearing the name ‘Defi’, which popped up again in 1969 to distinguish the toughest member of the first El Primero references known as the A3642. The Defy Skyline sub-collection appeared […]

Zenith Defy Revival A3648 Review Teddy Baldassarre
Zenith Jun 13, 2024

Zenith Defy Revival A3648 Review

There is no doubt that most enthusiasts think of the brand Zenith and picture, in their mind’s eye, a chronograph – a chronograph powered by the now storied El Primero automatic chronograph movement which debuted in 1969. Triple use of the word chronograph in one sentence notwithstanding, it punctuates the kind of watch associated with this powerhouse of a brand. And 1969 was a monumental year for automatic chronographs. But it was also the year Zenith introduced its punchy, ready for the 1970s, and decidedly orange dive watch: The Defy A3648. Yes, a Zenith diver was released the same year as the El Primero…and the latter clearly took off on a trajectory far different from that of its aquatic counterpart. Vintage Zenith A3648 from around the time of the watch's launch. Over the past decade or so, Zenith has proven itself to be unmatched in the watch game when it comes to revivals, homages, re-editions, whatever you like to call them (Zenith literally calls them “Revivals” so we will too). Some Zenith Revival models are modern riffs on vintage designs, with slight tweaks, while others are near 1:1 recreations. Think back to the Defy Revival models of the past two years, with both black and ruby dial options. Those were authentic recreations down to the vintage-style clasps (an under-looked component of homage, if you ask me!). At Watches & Wonders 2024, Zenith returned to the 1969 well and brought its spunky orange dive watch back to life in the form of the De...

Introducing – The Zenith Defy Revival A3648 Brings Back The 1969 Original Monochrome
Zenith Defy Revival A3648 Brings Apr 9, 2024

Introducing – The Zenith Defy Revival A3648 Brings Back The 1969 Original

1969 was a milestone year for Zenith watches with the brand’s launch of the world’s first high-frequency automatic chronograph movement. Although the El Primero stole the headlines, it was not the only model Zenith had up its sleeve. With slightly less fanfare, Zenith also launched its heavy-duty Defy family with its angular octagonal case, crazy […]

Zenith Introduces the Defy Skyline Chronograph SJX Watches
Zenith Introduces Apr 9, 2024

Zenith Introduces the Defy Skyline Chronograph

Amidst the plethora of sports watches with integrated bracelets, the Zenith Defy Skyline stands out for its uncluttered design and relative affordability. Now the lineup is joined by the Defy Skyline Chronograph. The chronograph maintains many of the signature features of the existing models, such as its octagonal case and star-patterned dial. Debuting in three dial colours, Defy chronograph is amongst Zenith’s sportier offerings. Like other recent launches, it is powered by the second-generation El Primero calibre. Initial thoughts The Defy Skyline Chronograph is another option for an enthusiasts seeking a sports chronograph with a contemporary design and integrated bracelet. There are admittedly many, many options in this category, but the Defy chronograph is one of the value-minded offerings. At CHF11,900, the Defy chronograph with its in-house movement is competitively priced compared to other offerings in the sports watch market. The brand has opted for a conservative design while retaining a modern edge. Though the overall design is familiar, it has incorporates a few unusual details, including a polygonal flange around the dial. The watch is being launched in only three colours, all simple, easy shades that are well suited to the design, though not exciting. With the limited colours in mind, some might want to wait for subsequent releases that may adopt the colours found in its time-only counterpart. Zenith’s latest addition The Defy chronograph joins Zenith’...

Zenith Introduces a Long Awaited Chronograph to the Defy Skyline Collection Worn & Wound
Zenith Introduces Apr 9, 2024

Zenith Introduces a Long Awaited Chronograph to the Defy Skyline Collection

Zenith returns to the Defy collection this year at Watches & Wonders with the introduction of a Defy Skyline Chronograph. This is a version of the next-gen Defy that Zenith fans have been anticipating since the collection’s debut, given the long line of chronographs that have populated Defy collections past and present. The new Defy Skyline Chronograph follows iterations of the Skyline that have played with materials and skeletonization, so it seems possible (even likely) that eventually the chronograph will get similar treatment. For now, we have a trio of references in stainless steel that feel like a logical extension of the Defy Skyline series.  The 42mm case is effectively unchanged from previous skylines, and is Zenith’s contemporary take on the original 8-sided Defy case first seen in the late 1960s. The Defy, as opposed to the Chronomaster and Pilot lines, has always been Zenith’s playground for the avant-garde and the unusual, and the highly sculptural case design of this watch, that traces a lineage back to the original, underscores the very nature of what the Defy is.  Dial options at launch include metallic black, blue, and silver, and feature the signature star pattern that has been present in the Skyline from the beginning. The subdials are oversized and overlap just slightly (perhaps not as much as on a Chronomaster) and are color matched to the main dial, but do not feature the Skyline stars. As with most other watches running on El Primero movement...

Hands-On: the Zenith Chronomaster Sport Titanium Worn & Wound
Grand Seiko s titanium finishing Mar 12, 2024

Hands-On: the Zenith Chronomaster Sport Titanium

Somehow, to this point, I’ve avoided taking a stand in the ongoing conversation in our ranks about the merits of titanium. Zach Weiss, our cofounder, is an unabashed fan, and confidently declares at every opportunity that all watches might as well be made of the stuff. Our friend Taylor Welden at Carryology takes it a step further, and said he’d happily eat little titanium chips if given the chance. No one’s titanium journey on this team has been more closely watched than Kat Shoulders’ though, who was first a skeptic, then an adopter, and now, well, her stance continues to evolve.  For my part, I guess I don’t have a strong opinion either way. I have nothing against titanium watches at all, and I’ve owned several, but it’s not, in general, a material I seek out. I think it’s because as a metal, it tends to not have the characteristics I like most. I like elaborate, complex case finishing, and a bit of weight. I tend to prefer steel’s glassy shine to titanium’s grays. There are exceptions, of course. Grand Seiko’s titanium finishing is notable in that it has many of the qualities of steel. And some watches just work better when they are feather light.  $11800 Hands-On: the Zenith Chronomaster Sport Titanium Case Titanium Movement El Primero 3600 Dial Gray Lume Yes Lens Sapphire Strap Titanium bracelet Water Resistance 10 ATM Dimensions 41 x 46.8mm Thickness 13.6mm Lug Width 20mm Crown Screw down Warranty Yes Price $11800 The new Chronomaster Sport f...