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Results for Grand Seiko SLGW003

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Review: The New Grand Seiko Kodo Constant-force Tourbillon SLGT003 Deployant
Grand Seiko Kodo Constant-force Tourbillon SLGT003 Mar 13, 2023

Review: The New Grand Seiko Kodo Constant-force Tourbillon SLGT003

In 2020, the world bore witness to something off the beaten path from Grand Seiko: an openworked, concept movement which incorporates a constant-force mechanism and a tourbillon as one unit on a single axis. This was the T0 Constant-force Tourbillon concept movement. While impressive, the T0 was an uncased, unwearable movement; it was not aRead More

In-Depth II: Grand Seiko Kodo Constant-Force Tourbillon SLGT003 SJX Watches
Grand Seiko  Kodo Constant-Force Tourbillon SLGT003 Oct 17, 2022

In-Depth II: Grand Seiko Kodo Constant-Force Tourbillon SLGT003

Having delved into the origins, concept, and design of the Grand Seiko Kodo Constant-Force Tourbillon SLGT003, we now turn to the granularity of its technical qualities. The Kodo is first and foremost a chronometer in the vein of the watches that lay behind the founding of Grand Seiko (GS). A brand focused on precision timekeeping since its establishment in 1960, the opening act of GS in its first decade was competing in observatory chronometer trials at Neuchatel and Geneva – and winning, much to the horror of the Swiss. Several decades later the brand is still pursuing perfect accuracy in both mechanical, quartz, and hybrid formats, most notably with the novel Spring Drive. The Kodo powered by the cal. 9ST1 is the latest, and arguably greatest, endeavour in chronometric precision from GS. But it is like no GS that has come before it. Rather than rely on modern technology and materials, the Kodo instead revisits traditional mechanical solutions, namely as the constant-force mechanism and tourbillon. Combining the two in a wristwatch mark a milestone for GS, or any Japanese watchmaker for that matter. To understand the mechanical systems within the Kodo, we must first understand the fundamental challenges in precision timekeeping. The factors that influence precision fall into two categories, the first related to the barrel or energy supply, and the second, gravity’s effect on the balance or oscillator. Energy challenges The barrel is the source of energy in a conve...

In-Depth I: Grand Seiko Kodo Constant-Force Tourbillon SLGT003 SJX Watches
Grand Seiko  Kodo Constant-Force Tourbillon SLGT003 Oct 13, 2022

In-Depth I: Grand Seiko Kodo Constant-Force Tourbillon SLGT003

The first complicated mechanical watch from the brand in its six decades years of history, the Grand Seiko Kodo Constant-Force Tourbillon SLGT003 is an impressive example of high horology. The Kodo is self-explanatory: it is equipped with a highly skeletonised and sensitively finished movement boasting a one-second remontoir and tourbillon, both mounted on the same axis. The Kodo is an interesting watch in all respects, tangible and intangible, making it worth a detailed examination – exactly the focus of this two-part series. In this first instalment, we explain the development and conception of the Kodo, as well as the decoration of its movement. In the second part that will be published subsequently, we detail how the movement works and analyse how it compares to the competition. A surprise Evolved from the T0 concept movement unveiled just two years ago, the Kodo is undoubtedly a milestone – and a major step upwards – for the Japanese watchmaker that’s historically been focused on simple but high-quality everyday watches. Like conventional Grand Seiko (GS) watches, the Kodo is all about high-quality timekeeping, but it is far from simple. An example of a typical Grand Seiko, which is strikingly different from the Kodo, yet not so different in terms of philosophy Well known for its quest for high precision – amongst its earliest timepieces were observatory-tested chronometers – GS has done much research and development in the cutting-edge timekeeping techn...

Up Close: Grand Seiko 60th Anniversary Hi-Beat SLGH003 SJX Watches
Grand Seiko 60th Anniversary Hi-Beat SLGH003 May 3, 2021

Up Close: Grand Seiko 60th Anniversary Hi-Beat SLGH003

Last year’s 60th anniversary was a major event for Grand Seiko, which unveiled several new movements and plenty of limited editions to mark the occasion. The most notable launch was probably the 9SA5 movement, a high-frequency and high-end automatic calibre. The movement made its debut in the luxe yellow-gold SLGH002, then in the steel Grand Seiko 60th Anniversary Hi-Beat SLGH003 a few months later. Since then the movement has been installed in a similar, but even more pricey platinum edition, and finally the regular production “White Birch” SLGH005. The cal. 9SA5 All the models are essentially the same, save for different dial finishes and case materials. Here we take a close look at the SLGH003 in steel as a representative for the “SLGH” family. Like its siblings in the family, the SLGH003 is a brand-new reference. The case and dial designs evolved from the existing and familiar Grand Seiko style, but inside is a radically new movement – the cal. 9SA5 with a Dual Impulse escapement. The aesthetic changes have created more refined exterior that better showcase the brand’s case finishing, but more crucially, the improvements signify the brand’s moves upmarket – exemplified by the more elaborate movement and higher price tag. The SLGH003 Initial thoughts Unique among the Grand Seiko line up in terms of its movement and styling, the “SLGH” family boasts new features that are mostly for the better, such as the more elaborate case and sophisticated mov...

Celebrate! The Grand Seiko SLGH003 brings the mind-bending dual impulse escapement in the 9SA5 movement to steel Time+Tide
Grand Seiko SLGH003 brings Oct 14, 2020

Celebrate! The Grand Seiko SLGH003 brings the mind-bending dual impulse escapement in the 9SA5 movement to steel

Grand Seiko has been a true value proposition for collectors since its rebirth, providing some of the highest quality watches for your dollar. Many have had some contention with the inevitable reality that the brand would eventually go further upmarket, anxious that their latest and greatest technical innovations would be out of reach of the … ContinuedThe post Celebrate! The Grand Seiko SLGH003 brings the mind-bending dual impulse escapement in the 9SA5 movement to steel appeared first on Time+Tide Watches.

First Look – Grand Seiko Goes Hand-Wound With the New Birch Bark SLGW003 and SLGW002 (incl. Video) Monochrome
Grand Seiko Goes Hand-Wound Apr 9, 2024

First Look – Grand Seiko Goes Hand-Wound With the New Birch Bark SLGW003 and SLGW002 (incl. Video)

In 2020, for its 60th anniversary, Grand Seiko unveiled two milestones: a new automatic, hi-beat movement named calibre 9SA5 and a new collection of watches with an updated design language known as Evolution 9. It took us and the watch community a bit of time to understand the importance of this move by the Japanese watchmaker; […]

Grand Seiko After Dark, “Moonlit Birch” SLGW007 SJX Watches
Grand Seiko After Dark “Moonlit Birch” Sep 22, 2025

Grand Seiko After Dark, “Moonlit Birch” SLGW007

Grand Seiko has been fairly quiet over the summer, but has just unveiled the latest addition to its Evolution 9 collection, the “Moonlit Birch” SLGW007. Effectively a new variant of the “Birch Bark” SLGW003 with a steel case and navy blue dial, the Moonlit Birch is a competent alternative to its titanium stablemate. In other words, it’s an attractive new livery for what was already a compelling watch, and retains its best characteristics including a nuanced and ergonomic case, gorgeous dial furniture, and the brand’s latest manually wound cal. 9SA4 movement. Initial thoughts The original “Birch Bark” launched last year and was one of the standout releases at Watches & Wonders due to its elegant case profile and impressive new movement. The Moonlit Birch is identical in most respects, but the case is stainless steel, rather than titanium, and the dial is finished in navy blue instead of bright white. Despite these modest differences, the Moonlit Birch is appealing in its own right. The dial texture is subtle, but it’s enough of a Grand Seiko calling card to prevent the watch from looking too generic; a common trap for time-only dress watches. The stainless steel case exhibits the brand’s Evolution 9 styling, which gives the Moonlit Birch a bold, angular presence. In answer to the demand for slimmer options from Grand Seiko, the dimensions are nearly ideal, 38.6 mm in diameter and just under 10 mm thick. The watch is powered by the cal. 9SA4, which is pa...

Grand Seiko Introduces The “Sunrise” Tentagraph SLGC006 And “Moonlit Birch” SLGW007 Fratello
Grand Seiko Introduces Sep 11, 2025

Grand Seiko Introduces The “Sunrise” Tentagraph SLGC006 And “Moonlit Birch” SLGW007

Grand Seiko has been steadily expanding its Evolution 9 collection since its introduction in 2020. We have seen a wide variety of releases linked by a combination of modern case designs and technologically advanced new calibers. For its latest introductions, Grand Seiko releases two variations of popular models in the collection. The first is the […] Visit Grand Seiko Introduces The “Sunrise” Tentagraph SLGC006 And “Moonlit Birch” SLGW007 to read the full article.

Grand Seiko Introduces the SLGW002 and SLGW003 “Birch Bark” SJX Watches
Grand Seiko Introduces Apr 12, 2024

Grand Seiko Introduces the SLGW002 and SLGW003 “Birch Bark”

Grand Seiko has introduced the Evolution 9 “Birch Bark” SLGW002 and SLGW003, in rose gold and “brilliant hard titanium” respectively. Named after the dial pattern, the “Birch Bark” is powered by a new manually-wound, high-beat caliber that features the brand’s proprietary dual-impulse escapement. The only completely new model introduced by Grand Seiko at Watches & Wonder this year, the new references introduce a new, notably slimmer aesthetic to the brand’s Evolution 9 collection.  Initial thoughts Grand Seiko has earned a devoted following in recent years, but collectors have been asking for slimmer options for some time; this release proves the brand is listening. While there’s nothing revolutionary about it, the watch has been nipped and tucked in all the right areas, getting the case down to 38.6 mm in diameter and just under 10 mm in thickness.  Compared to the most similar existing watch in the catalog, the Spring Drive SLGA009 “White Birch” launched two years ago, the new Evolution 9 feature a new movement, a thinner case, slimmer dial markers, and a horizontal interpretation of the brand’s signature white birch-inspired dial texture. The slimmer profile is made possible thanks to the new 9SA4 movement, which is essentially a 9SA5 without automatic winding. This makes it the first manually wound caliber from Grand Seiko’s latest generation of mechanical movements, and also the first to be available without a date function. Perhaps the onl...

Grand Seiko celebrates the 44GS with a slimmed-down duo of SLGA013 and SLGH009 Time+Tide
Grand Seiko celebrates Mar 28, 2022

Grand Seiko celebrates the 44GS with a slimmed-down duo of SLGA013 and SLGH009

Never ones to shy away from a party, Grand Seiko release the SLGA013 and SLGH009. Celebrating the 55th anniversary of the 44GS, these Heritage collection pieces offer well-known GS movements, with improvements to their design, allowing for a better fit on-wrist. With stellar dials and Grand Seiko proprietary steel, neither of these 550-piece limited editions … ContinuedThe post Grand Seiko celebrates the 44GS with a slimmed-down duo of SLGA013 and SLGH009 appeared first on Time+Tide Watches.

Grand Seiko Introduces the Spring Drive SLGA009 “White Birch” SJX Watches
Grand Seiko Introduces Jan 17, 2022

Grand Seiko Introduces the Spring Drive SLGA009 “White Birch”

Though it was two years ago as the Grand Seiko’s flagship Spring Drive movement, the 9RA5 still feels new, simply because the latest-generation movement hasn’t found its way into many watches, save for a pair of limited editions. Now it finally makes it into a regular-production model, the Grand Seiko Spring Drive SLGA009 “White Birch”. The latest Spring Drive, like the mechanical SLGH005, is inspired by the tree of the same name that’s native to the area around Grand Seiko Studio Shizukuishi. Initial thoughts The SLGH009 “White Birch” clearly becomes the Grand Seiko’s showcase Spring Drive – it resembles the previous generation’s bestseller, the famous “Snowflake”, but is substantially upgraded in terms of features and finish. The combination of familiar styling and improved quality makes it attractive. Part of the appeal lies in the 9RA5 movement, which on the surface seems like a mere upgrade over the predecessor 9R65. But it is more than just the power reserve being increased to five days, and the new calibre boasts an entirely new architecture, including both a new gear train and integrated circuit for the Spring Drive regulator, as well as a better finishing. The other aspect of its appeal lies in the design, which has dubbed “Evolution 9”. As always is the case with Grand Seiko, Evolution 9 is inspired by vintage Grand Seiko models, but brings with it a sense of solidity and refinement, thanks to the flatter case, heftier bracelet, a...

Grand Seiko Introduces the 60th Anniversary Diver 600M SLGA001 SJX Watches
Grand Seiko Introduces Mar 5, 2020

Grand Seiko Introduces the 60th Anniversary Diver 600M SLGA001

Having just unveiled the impressive 9SA5 automatic movement in the Hi-Beat 80 Hours SLGH002 as part of its 60th anniversary line-up, Grand Seiko is also rolling out a newly-developed Spring Drive movement – the first with a five-day power reserve and thermocompensation. Unusually, the new calibre is making its debut in a dive watch, the Grand Seiko 600M Professional Diver’s watch (ref. SLGA001). Characterised by large, angular lugs, case design of the new diver is familiar, borrowing from the current Grand Seiko high-frequency dive watches. In short, it’s the typical Grand Seiko diver look, meaning big, bold and chunky, measuring 46.9 mm in diameter and 16 mm high. Both the case and bracelet are made of Seiko’s proprietary “high-intensity” titanium, which 30% lighter than steel and more resistant to scratches, so the size of the SLGA001 does not translate into substantial weight. Likewise, the dark blue dial retains the usual Grand Seiko dive watch styling. Legibility is maximised with large hands and hour markers – both with generous amounts of luminous paint. The date display on the new diver is at four o’clock, instead of the usual three o’clock. But the date is not just a relocation – thanks to the new 9RA5 movement, the date disc jumps at a “greatly increased” speed for a crisper changeover. The 9RA5 While the design of the watch contains no surprises, the Spring Drive movement inside is brand new and incorporates several features originally...

First Look – Grand Seiko Recreates the Hi-Beat 45GS with the new SLGW004 and SLGW005 Monochrome
Grand Seiko Recreates Sep 2, 2024

First Look – Grand Seiko Recreates the Hi-Beat 45GS with the new SLGW004 and SLGW005

In 2013, to celebrate 100 years of watchmaking for the Seiko group, Grand Seiko released a limited reissue of the iconic 44GS – 700 pieces for the stainless steel version (SBGW047) and 70 pieces each for the white, yellow, and rose gold versions (SBGW043, SBGW044, SBGW046). This reissue perfectly recreated the classic look and underscored […]

First Look – The New Grand Seiko Evolution 9 Atera Valley SLGA025 Monochrome
Grand Seiko Evolution 9 Atera Valley Sep 2, 2024

First Look – The New Grand Seiko Evolution 9 Atera Valley SLGA025

A contemporary yet gentle evolution of the original “Grammar of Design” established with the 1967 44GS, the Evolution 9 collection is the vision of the future for Grand Seiko. More modern, more ergonomic, presented in a sporty-chic attire and mostly equipped with new generations of the emblematic calibres 9R and 9S, this collection has already […]

Grand Seiko Steps Into The Future With New Spring Drive U.F.A. SLGB001 And SLGB003 Fratello
Grand Seiko Steps Into Mar 31, 2025

Grand Seiko Steps Into The Future With New Spring Drive U.F.A. SLGB001 And SLGB003

Seiko founded Grand Seiko to pursue watchmaking excellence. Most commonly, this mission translated into creating the most accurate watches possible. Later on, aesthetics also played an increasingly important part thanks to the Grammar of Design. Grand Seiko was Seiko’s answer to the Swiss domination of the industry, and the line offered watches that could compete […] Visit Grand Seiko Steps Into The Future With New Spring Drive U.F.A. SLGB001 And SLGB003 to read the full article.

First Look – The new Grand Seiko Spring Drive UFA SLGB001 & SLGB003 (With Finally a Micro-Adjustment Clasp) Monochrome
Grand Seiko Spring Drive UFA SLGB001 Mar 31, 2025

First Look – The new Grand Seiko Spring Drive UFA SLGB001 & SLGB003 (With Finally a Micro-Adjustment Clasp)

When talking about vintage Grand Seiko watches, some references or acronyms have a lot of meaning. For instance, 44GS refers to one of the most important models ever, the watch that initiated the Grammar of Design and the shape of all subsequent creations. The acronym VFA also has its importance. Standing for Very Fine Adjusted […]

Grand Seiko Reveals the Kodo Constant-Force Tourbillon SLGT003 SJX Watches
Grand Seiko Reveals Mar 30, 2022

Grand Seiko Reveals the Kodo Constant-Force Tourbillon SLGT003

Unveiled in 2020, the Grand Seiko T0 Constant-Force Tourbillon was a surprisingly complicated movement from a watchmaker that has historically focused on no-nonsense, everyday watches. In interview with us last year, Seiko chief executive Akio Naito promised not to “keep people waiting for too long” and he has kept to his promise. Just two years after the T0 concept was revealed, its commercially available counterpart  version has arrived in the form of the Kodo Constant-force Tourbillon SLGT003. With a case that’s a mix of platinum and titanium, the SLGT003 has a movement that’s slightly different from the T0 concept. Its cal. 9ST1 retains the all-important constant-force mechanism integrated into the tourbillon cage, though the movement overall has been trimmed down slightly in both size and artistic expression – though it still has an aesthetic that is extreme by Grand Seiko standards. Initial thoughts The SLGT003 is a lot of watch: a skeletonised movement combining a tourbillon and a constant-force mechanism accompanied by a dead-beat seconds. And it also has twin barrels and a power reserve indicator. The SLGT003 is intriguing and impressive is to say the least. The amalgamation of several complications perfectly showcase the brand’s newfound prowess in complicated watchmaking, elevating the brand to another level entirely, one comparable with independent watchmakers. And it also marks a milestone for a watchmaker from Asia. But the design is over th...

Grand Seiko Introduces the 60th Anniversary Hi-Beat SLGH003 SJX Watches
Grand Seiko Introduces Oct 13, 2020

Grand Seiko Introduces the 60th Anniversary Hi-Beat SLGH003

Grand Seiko has progressively introduced a diverse line up of watches to mark its 60th anniversary, ranging from a remake of the vintage 3180 to the heavily jewelled 8 Days to the T0 Constant Force Tourbillon, while also opening the Grand Seiko Studio Shizukuishi production facility. Now the brand has finally reached the last of it anniversary watches with the Grand Seiko 60th Anniversary Caliber 9SA5 Hi-Beat 36000 80 Hours SLGH003. Although the 60th anniversary watches are numerous, the most significant was the Hi-Beat 80 Hours SLGH002, which was powered by the newly-developed 9SA5, the first of a new generation of movements that will underpin the Grand Seiko collection. The SLGH002 was available only in 18k yellow gold and correspondingly pricey, but now the movement is available in the all-steel SLGH003. Initial thoughts From the perspective of being a more affordable version of the yellow-gold SLGH002, the SLGH003 is appealing. It’s still an expensive watch – the retail price is US$9,700 – but a lot less than the US$43,000 of the gold model. But from the perspective of it being one of several anniversary editions, many of which share the same dial colour, it is less appealing. That is especially so given that the 9SA5 movement will inevitably be made available in regular-production models that will probably cost a bit less. So if the colour and design is a big draw, then the SLGH003 is a buy. If not, just wait for the next one. Anniversary livery The SLGH003 h...

Grand Seiko Goes Gold SJX Watches
Grand Seiko Goes Gold Grand Seiko Sep 19, 2025

Grand Seiko Goes Gold

Grand Seiko has unveils three gold Spring Drive models with the new 9RA2 movement, the Japan-only Heritage Collection SLGA030, SLGA027 and SLGA028, in rose, white, and yellow gold respectively. The new collection benefits from a slimmer case, a longer power reserve, and some new dials to go with the satisfying heft of a full 18k gold bracelet that weighs in at almost 200 g. SLGA030 in rose gold. Initial Thoughts While mostly unknown outside Japan, a trio of gold Spring Drive models in 44GS-style cases on full gold bracelets were a staple of the domestic Grand Seiko catalog for nearly a decade, powered by the cal. 9R15 that was once the brand’s finest automatic Spring Drive movement. While identical to the cal. 9R65, save for a gold medallion on the rotor, Seiko set aside the best performing quartz timing packages for these special movements. The earlier generation of all-gold models, from left to right: SBGA364, SBGA361, and SBGA362. Grand Seiko has decided that now is the time to refresh the line with the upgraded cal. 9RA2, while preserving the heavyweight gravitas and luxurious bracelet of its predecessor. I have anticipated these watches since the second generation of Spring Drive movements launched in 2020; it took five years, but the result meets my expectations, though I would have liked a gold winding weight to match the case material. Selling watches on full precious metal bracelets in this segment is a mark of a strong brand. Gold prices and luxury margins bein...