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Balance Wheel

The oscillating wheel at the heart of every mechanical watch.

Roger Dubuis Impresses with the RD780 Flyback Chronograph SJX Watches
Greubel Forsey though Aug 20, 2025

Roger Dubuis Impresses with the RD780 Flyback Chronograph

Representing a new era for the Roger Dubuis manufacture, the Excalibur Spider Flyback is an aggressively styled, motorsports-themed chronograph – boasting the impressive, high-spec RD780 movement with some unusual tricks up its sleeve, including an inclined balance. While the Excalibur Spider Flyback harkens back to the brand’s early aspirations in terms of movement construction and ambition, it diverges entirely in style with its supercar-inspired lines. Limited to 88 examples in pink gold, it debuted at Monterey Car Week – Roger Dubuis is a partner of Lamborghini – this variant in pink gold and blackened titanium is a new iteration of a model originally available in carbon composite. The RD780 Initial Thoughts In its past life, Roger Dubuis raised a menagerie of ambitious – perhaps overambitious – movements. While the brand thinned the herd after the 2008 financial crisis, some of that spirit lives on inside the Excalibur Spider Flyback. It attempts the dial-movement integration and three dimensionality mastered by some independent watchmakers like Greubel Forsey, though the construction is still fairly traditional, leading to some lost opportunities. The calibre is impressive – especially for a brand owned by a luxury group – but could be better. For example, the minutes counter could be inclined by 12° to mirror the balance and the imitation barrel bridge to be more convincing in terms of style and symmetry. With its over-the-top-style, the Richard Mil...

Insight: Hairspring Materials and Evolution Part II SJX Watches
Seiko SPRON 610 hairspring Lastly Aug 8, 2025

Insight: Hairspring Materials and Evolution Part II

Part I of our story on the evolution of hairspring materials covered temperature compensation along with the development of the first specialised balance spring alloy, Elinvar. The story brought us to the 1920s, when scientist and horologist Charles-Edouard Guillaume (1861-1938) finished his work on nickel-iron alloys and watchmakers begun embracing Elinvar springs paired with mono-metallic balances. In this second part we turn to newer hairspring alloys, like the now-ubiquitous Nivarox. Then we look at today’s landscape and the future, touching on research done by the Swatch Group with alternative, niobium-based alloys and also the specialised but obscure Seiko SPRON 610 hairspring. Lastly we discuss silicon springs, which are growing more prevalent across a range of timepieces. Elinvar’s weaknesses Elinvar was by far the greatest breakthrough in self-compensating alloy hairsprings at the time. Guillaume considered Elinvar good enough and not needing further improvement - unsurprisingly since he was its inventor - but other watchmakers and engineers continued to experiment with iron-nickel compounds because Elinvar’s inherent properties made it a good, but imperfect, material. Even though the alloy behaved predictably with temperature changes, its physical properties were not ideal to begin with. Elinvar was a soft metal, which posed its own suite of problems for spring applications. The importance of softness in terms of hairspring performance is not related ...

Insight: The Overcoil Hairspring, From Breguet to Phillips SJX Watches
Breguet Jun 2, 2025

Insight: The Overcoil Hairspring, From Breguet to Phillips

While the invention of the spiral hairspring by Christiaan Huygens in 1675 kickstarted a revolution in terms of portable precision timekeeping, the concept was far from fully developed. It was arguably only with the later invention of the overcoil hairspring that the ideal oscillator in portable watches emerged. For many years horologists - theoreticians and artisans alike - worked to perfect the balance-hairspring assembly to optimise its performance, notably in terms of isochronism. True isochronism became a sort of holy grail for watchmakers all around the world, who all sought to ameliorate the inherent quirks of the sprung oscillator. The recent Breguet Soucription features an overcoil hairspring of non-magnetic Nivachron alloy The need for end curves The quest for isochronism was a true challenge for horologists. Isochronism is the ability of the balance-hairspring assembly the have the same period of oscillation for small and large amplitudes alike. In other words, the balance oscillation takes the same period of time regardless of the degree travelled. This is very important, since a balance usually swings with high amplitude with a fully wound mainspring and then runs at progressively smaller amplitude as the barrel unwinds. As a timepiece is required to keep good time regardless of  its winding state, an oscillator whose period is independent from its amplitude is needed. (Another solution to this is to optimise the energy delivery from the mainspring with a...

SJX Podcast: Geneva Auctions and Breguet SJX Watches
Christopher Ward s daring new C12 May 6, 2025

SJX Podcast: Geneva Auctions and Breguet

In the fifth episode of the SJX Podcast, Brandon Moore and SJX discuss Breguet’s reinterpretation of the Souscription for its 250th anniversary, as well as a historical Breguet watches coming up for auction, including a pocket watch owned by Napoleon’s sister and the very first modern-day Breguet Sympathique. We also talk about Christopher Ward’s daring new C12 with a dial-side balance wheel and very contemporary styling, before moving on to antique watches and clocks coming up for auction at Phillips in Geneva, including a 1920s portico mystery clock by Cartier in the “orientalist” style. Lastly, we finish some complicated pocket watches, which are perhaps under appreciated but magnificent examples of horology. Listen on Apple Podcasts, Spotify, and YouTube.  

Audemars Piguet’s New Ceramic is the Same Hue as the Royal Oak 5402 SJX Watches
Audemars Piguet s New Ceramic Apr 16, 2025

Audemars Piguet’s New Ceramic is the Same Hue as the Royal Oak 5402

“Bleu Nuit, Nuage 50” was the colour code for the original Royal Oak “Jumbo” ref. 5402 ST of 1972, and now Audemars Piguet has translated the dark blue shade into its latest ceramic. Making its debut in three Royal Oak models, including the Royal Oak Double Balance Wheel Openworked, the “Bleu Nuit, Nuage 50” ceramic is restrained and a departure from the bright, almost electric blue of the brand’s earlier blue ceramic. Initial thoughts Ceramic is a material that lends itself well to the Royal Oak design; the brushed and polished surfaces that are the trademark Royal Oak surface finishing look good with the hardness and glossiness of ceramic. The earlier bright blue ceramic used by AP was too bright in my opinion. The new dark blue hue, on the other hand, feels just nice. The downside of an all-ceramic Royal Oak is the price. The Royal Oak Offshore Chronograph with a matching ceramic bracelet costs almost US$90,000, double the price of the steel equivalent and almost as much as the gold model. According to AP, the cost is primarily due to the difficult in finishing the ceramic – every element of the case and bracelet is brushed or polished by hand – which is true, but it’s still expensive. The most affordable model with the new ceramic only has its bezel and pushers in ceramic ” Night blue” According to AP, “Bleu Nuit, Nuage 50” (which translates as “night blue, cloud 50”) was the code for the dark blue, almost grey, in the catalogue of Stern...

Introducing - The New H. Moser & Cie Endeavour Centre Seconds Concept Purple Enamel Monochrome
H. Moser & Cie Endeavour Centre Apr 3, 2025

Introducing - The New H. Moser & Cie Endeavour Centre Seconds Concept Purple Enamel

Moser hits the nail on the head when it states that for a straightforward three-hand watch to rise above the generic models populating the field, it requires perfect balance and proportions, high-end finishes and a unique touch. The new Endeavour Centre Seconds Concept ticks all the boxes with its well-finished, balanced case, captivating purple Grand […]

Audemars Piguet Introduces Three Royal Oak “Bleu Nuit, Nuage 50” Models Fratello
Audemars Piguet Introduces Three Royal Oak Apr 1, 2025

Audemars Piguet Introduces Three Royal Oak “Bleu Nuit, Nuage 50” Models

Audemars Piguet is famous for using ceramics in its Royal Oak line. Some of the many highlights include the ceramic Royal Oak Perpetual Calendar and Double Balance Wheel Openworked models. When it comes to specific colors, the first two that come to mind are the black and electric-blue shades that most of you will know. […] Visit Audemars Piguet Introduces Three Royal Oak “Bleu Nuit, Nuage 50” Models to read the full article.

Insight: Rolex Land-Dweller Cal. 7135, Patents and Innovation Explained SJX Watches
Rolex Land-Dweller Cal 7135 Patents Mar 31, 2025

Insight: Rolex Land-Dweller Cal. 7135, Patents and Innovation Explained

Rolex has entered uncharted territory with the Land-Dweller, arguably the most advanced and radical creation from a hitherto conservative brand. The Land-Dweller is significant, perhaps even game changing, not because of the integrated bracelet or patented solid lume, but because of the cal. 7135, a new calibre with an all-new double-wheel escapement known as Dynapulse and a ceramic balance staff. (This story details the technical advances in the movement; for a review of the watch, check out the accompanying story.) The Land-Dweller 40 mm in platinum The fundamentals Why is it significant, or even game changing? The cal. 7135 is the first in-house, serial production Rolex movement that is high frequency, beating at 5 Hz or 36,000 beats per hour. All things being equal, a higher frequency promises superior timekeeping. Despite the higher frequency, the cal. 7135 still has a 66-hour power reserve. That’s thanks in part to the Dynapulse escapement which is 30% more efficient than a conventional Swiss lever escapement, while occupying essentially the same volume of space. The balance assembly of the cal. 7135 Dynapulse is one of several innovations that make the cal. 7135 a landmark, especially since it will be produced at scale. While Rolex has traditionally been associated with incremental innovation, the cal. 7135 is a revolution. The Land-Dweller is the subject of 32 filed patents, 18 of which are unique to the watch. Moreover, 16 of the patents unique to the watch are ...

New Release: Raúl Pagès RP2 - White Agate follows Soberly Onyx. Independent Watchmaking at its Best! Quill & Pad
Mar 29, 2025

New Release: Raúl Pagès RP2 - White Agate follows Soberly Onyx. Independent Watchmaking at its Best!

Raúl Pagès goal for the RP2 was to design a timeless classic, where purity of form meets technical excellence. A watch that would serve as the foundation of his collection for years to come. Every detail, from the clean lines to the entirely in-house movement, reflects his pursuit of balance between apparent simplicity and absolute refinement.

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...

Voutilainen Gives the KV20i Reversed a Cherry Facelift SJX Watches
Voutilainen Gives Nov 18, 2024

Voutilainen Gives the KV20i Reversed a Cherry Facelift

Although the Voutilainen style is rooted in tradition, sometimes it encompasses less-than-conservative watches, like the Voutilainen KV20i Reversed Cherry, a colourful variant of the brand’s signature inverted-movement model. Kari Voutilainen is one of the most respected contemporary independent watchmakers - and for good reason. He has struck a perfect balance between the artisanal aspects of horology with enough business acumen to guarantee him absolute creative liberty and longevity. Despite his success, Mr Voutilainen didn’t scale up his namesake brand, instead choosing to continue making small-run timepieces. While the KV20i Reversed Cherry is not a limited edition, only a handful will be made, as is typical of the brand. Initial thoughts The Vingt-8 Reversed is a staple of the Voutilainen collection, having started five years ago with the 28TI – short for “Titanium Inverse”. An evolution of the Inverse, the KV20i Reversed is remarkably similar, although much has changed in terms of details. Voutilainen wristwatches are characterised by two key traits: impeccable movements and hand-made guilloche dials sporting deep and rich patterns. The Reversed puts the former in the front, taking the place of the dial, while guilloche is concealed on the back.  While a guilloché front dial will surely be missed, the visible mechanics more than compensate. The latest incarnation of Voutilainen’s in-house cal. 28 reverses the construction, which required a number ...

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...

REVIEW: Hands-On With Baume & Mercier Riviera 10770 WatchAdvice
Baume & Mercier Riviera 10770 Sep 20, 2024

REVIEW: Hands-On With Baume & Mercier Riviera 10770

The Riviera 10770: Baume & Mercier’s Perfect Balance of Form and Function is now met with a brilliant emerald-green dial! What We Love: Exceptional dial design The movement offers a 5-day power reserve A smaller and slimmer case makes it more versatile. What We Don’t: The bracelet design is too plain for Riviera’s case finishing and dial design Lack of micro-adjustment on bracelet. Lack of colour options for secondary strap options (to colour match with the dial) Overall Rating: 8.95/10 Value for Money: 9.3/10 Wearability: 8.75/10 Design: 9/10 Build Quality: 8.75/10 Founded in 1830, Baume & Mercier, as a watchmaker, has long been known to have a deep-rooted passion for horology, reflected through their timepeices that show elegance and precision. Brothers Louis-Victor and Célestin Baume founded Baume & Mercier, and the brand quickly found itself on the international stage with a reputation for creating watches of exceptional quality, earning them numerous awards for precision at international exhibitions. In 1918, Baume & Mercier further solidified its “luxury image” by bringing in Paul Mercier as a partner. Paul Mercier brought a modern vision to the brand, leaning more towards aesthetic innovation while still upholding the brand’s technical excellence. This philosophy of Paul Mercier laid the groundwork for future Baume & Mercier collections! View this post on Instagram A post shared by Baume & Mercier (@baumeetmercier) All-new Baume & Mercier Riviera 10...

Hands-On With The Well-Balanced Lebond Souto Moura Fratello
Jul 22, 2024

Hands-On With The Well-Balanced Lebond Souto Moura

A little over a year ago, Lebond Watches unveiled its inaugural Siza model to the public. The Barcelonian brand works with famous architects to create each one’s take on a watch. After world-famous architect Álvaro Siza was the first to do so, the brand’s second effort debuted earlier this year. This time, Lebond founder Asier […] Visit Hands-On With The Well-Balanced Lebond Souto Moura to read the full article.

Hands-on - The Bold and Ultra-Modern Roger Dubuis Excalibur Titanium Monotourbillon Monochrome
Roger Dubuis Excalibur Titanium Monotourbillon Mr Jul 1, 2024

Hands-on - The Bold and Ultra-Modern Roger Dubuis Excalibur Titanium Monotourbillon

Mr Roger Dubuis founded his eponymous brand in 1995, swiftly achieving success with timepieces that deftly balance traditional watchmaking craftsmanship and bold, expressive designs. Since 2003, the brand has been renowned for its expertise in tourbillon watches, starting with the calibre RD03. This fully integrated manufacture has since become a specialist in architectural skeletonised tourbillons, […]

Baltic Kicks off the Tour Auto with a Limited Edition Tricompax Chronograph Worn & Wound
Baltic Kicks off Apr 18, 2024

Baltic Kicks off the Tour Auto with a Limited Edition Tricompax Chronograph

The Tour Auto, rooted in the historic Tour de France Automobile dating back to 1899, has become a pinnacle of motorsport, featuring legendary drivers like Maurice Trintignant and iconic brands such as Ferrari and Porsche. Today, over 250 competing crews traverse France’s scenic roads and racetracks, captivating spectators. Baltic returns for a second year in the row as the Official Timekeeper, and, in commemoration of the event, has produced 500 Tricompax timepieces. The Tricompax’s colorway strikes a balance between tradition and modernity, drawing inspiration from the excitement and iconography of the race. Its dial, in a matte light beige, complements three black-ringed subdials, reminiscent of the Tour de France Automobile’s colors. Accentuated by a black railway track, it pairs harmoniously with the tachymeter scale bezel, designed for speeds of up to 200 km/h. The Tricompax is encased in a 39.5mm 316L stainless steel case, clocking in at a thin 13.5mm profile. With a 63-hour power reserve from the Sellita SW510-M manually wound movement, 50-meter water resistance, and its double-domed sapphire crystal, each feature of this watch is meant for the long-haul.  Each watch comes with both a steel flat link bracelet and a navy blue Alcantara strap, housed in a beautifully presented custom-made case. Also included in the case is a Rally Timer comprising two emblematic motorsport tools: a stopwatch with a matte light gray dial, operated by a Hanhart hand-wound movemen...

Hands-on - The Updated and Captivating new Glashütte Original Senator Excellence Models Monochrome
Glashütte Original Senator Excellence Models Jan 4, 2024

Hands-on - The Updated and Captivating new Glashütte Original Senator Excellence Models

In 2016, Glashütte Original unveiled the Senator Excellence series, an offspring of the more considerable Senator collection distinguished by a subtly modern and elegant aesthetic. Along with the series, the brand introduced the in-house Calibre 36, featuring a silicon balance spring, a substantial 100-hour power reserve, and chronometer-grade timekeeping. This innovative movement was the foundation […]

Breaking News: Breitling Acquires Universal Genève SJX Watches
Breitling Acquires Universal Genève Breitling Dec 12, 2023

Breaking News: Breitling Acquires Universal Genève

Breitling has just announced the acquisition of Universal Genève, a once-storied brand famous for its Polerouter and Compax chronographs but that was dormant for years. Breitling will pay CHF60 million for the brand, but in tranches with CHF20 million upfront and the balance over the next five years. The acquisition marks the first step in chief executive Georges Kern’s ambitions of building a watchmaking group, which will presumably go public. According to Mr Kern, Universal will be revived by a new team and run independently of Breitling, though it is almost a certainty Breitling will bestow upon its sister company some of its in-house movement know-how. A sleeping beauty Since 1989, Universal Genève has been owned Stelux, a Hong Kong watchmaking group focused on the affordable end of the market. The company’s primary business is the lucrative distribution of Seiko in Hong Kong and Southeast Asia, while its City Chain stores specialised in low-priced watches. Stelux owns a handful of other Swiss brands, including Solvil et Titus and Catena, none of which are premium brands as Universal might possibly be. Although Universal attempted several halfhearted comebacks, particularly in the 1990s, the brand has gone nowhere for some time, making it a relatively easy turnaround given the starting point. Commenting in the takeover announcement, Breitling chief executive Georges Kern says, “Rebuilding a brand with such a rich narrative is not a quick endeavor-it is a meti...

Seiko Introduces New Caliber Within Prospex GMT Diver Collection Worn & Wound
Seiko Introduces New Caliber Within Mar 8, 2023

Seiko Introduces New Caliber Within Prospex GMT Diver Collection

Seiko ventures into new (and much requested) territory this week with the release of a new collection of GMT divers within their Prospex family. Using their modern 6159 design language seen in watches like the SPB187 with MM200 roots, the new watches strike a fine balance between their roots, and a strong contemporary vision for the range. Seiko has proven quite adept at this in recent years with their restructuring of their dive watch collections, but these latest examples bring something new to the table: a GMT complication within a new 3 day automatic movement, the 6R54.  The new Prospex GMT diver range welcomes two new references in the SPB381 and 383, and in true Seiko fashion, a single limited edition in the SPB385. Each welcomes the new 6R35 within a steel 42mm case that measures 12.8mm in thickness, and should wear quite similarly to this SPB187 we went hands-on with right here. The angular case gets the distinctive deep chamfer along the lug which has a relatively short overhang to make for a perfectly manageable experience on the wrist. These watches mark the first time a mechanical GMT movement has made its way into the Prospex dive watch, as the GMT diver is something of a niche genre, and may, to some extent, excuse the fact that this is a caller style GMT execution. The GMT hand can be set independently in one-hour increments, making it a better option for those who work with or communicate with other time zones more than for those who travel between them fr...

The Ulysse Nardin Blast Tourbillon Blue & Gold offers exemplary in-house machined mastery Time+Tide
Ulysse Nardin Blast Tourbillon Blue & Feb 24, 2023

The Ulysse Nardin Blast Tourbillon Blue & Gold offers exemplary in-house machined mastery

Ulysse Nardin Blast Tourbillon Blue & Gold’s faceted case is inspired by the lines of stealth aircraft design 45mm in diameter, 18K rose gold and PVD blue titanium case. Flying Tourbillon. Hours and minutes. Escapement wheel, anchor and balance spring in silicium. When delving into the romanticism of traditional high-end watchmaking, we often discuss hand-craftsmanship. But, … ContinuedThe post The Ulysse Nardin Blast Tourbillon Blue & Gold offers exemplary in-house machined mastery appeared first on Time+Tide Watches.

INTRODUCING: The Brellum Pilot LE.1 GMT Chronometer wants to become your frequent flyer Time+Tide
Feb 10, 2023

INTRODUCING: The Brellum Pilot LE.1 GMT Chronometer wants to become your frequent flyer

The Brellum Pilot LE.1 GMT Chronometer is their latest pilot’s watch. It features both GMT and chronograph complications. It’s a nice balance between sporty and dressy. We’ve shown a lot of love to Brellum’s Pandial series of watches in the past, but it’s been far too long since we’ve showcased their other capabilities. The new … ContinuedThe post INTRODUCING: The Brellum Pilot LE.1 GMT Chronometer wants to become your frequent flyer appeared first on Time+Tide Watches.

Hands On: Greubel Forsey Double Balancier Convexe SHH Edition SJX Watches
Greubel Forsey Double Balancier Convexe SHH Sep 8, 2022

Hands On: Greubel Forsey Double Balancier Convexe SHH Edition

A “concept” store for high-end watches when it first opened in 2005, Sincere Haute Horlogerie (SHH) closed its original location in the now-closed Hilton hotel in 2019. Three years on, Singapore retailer Sincere is reviving SHH at the city state’s landmark casino resort. To commemorate the event, SHH has unveiled several limited editions created in collaboration with independent watchmakers led by the Greubel Forsey Double Balancier Convexe SHH Edition. A watch with twin balance wheels linked by a differential, the SHH edition is housed in the streamlined “Convexe” case that defines the Greubel Forsey’s sports watches. But unlike the brand’s sports watches to date, this is striking in an ultra-contemporary purple livery that’s uncommon for such a complicated watch. The rationale behind the juxtaposition of bold colours and refined complications is straightforward according to Sincere chief executive Ong Ban. “For the new generation, watches go with their dress and the younger ones want… [watches] that go with sneakers or hoodies,” explains Mr Ong, “But while the cosmetics evolve over the years, but the essence of finely executed movements remains the same.” Even the titanium main plate of the movement is finished in purple Initial thoughts The new Double Balancier is a haute horlogerie sports watch in an eye-catching colour and the requisite integrated strap that will no doubt draw a new audience to the brand. While Greubel Forsey (GF) wat...