Tilt phone… better text & tables

Credor Watch Information

Credor - a history and a Phoenix

Credor - in fact Crêt D'or as a product line launched in late 1974, but at that time not as a standalone brand and not with the distinctive golden mountain crest at the 12 ‘clock position.

Seiko described this line “as a world of beauty that blends the brilliance of materials in the world with the world of beauty that harmonizes with the delicate taste. It is the highest peak of the watch and the delicate silhouette shines with the elegant supreme beauty - Seiko Crêt D'or”. The 18k logo is a representation of the mountain symbol 山, modified to show them rising to meet three stars in the sky. The extension of the base and the placement of the stars form an equilateral triangle, once again resembling a mountain range.

Of course in the early 1970’s Seiko produced high end precious metal models. They were presented in the standard catalogs, but many only in the Seiko Luxury catalogs and were available only through select dealers in a similar way as the Laurel then or the Master Shop models today.

When the branding changed to Credor exclusively in 1980, it showed Seiko’s commitment to establish a luxury line equaling Grand Seiko. The majority of watches were branded as Credor, with a small number of Seiko branded models. None of these watches however featured the new logo.

In 1981 the first 4 watch models are shown with the Credor mountain logo, the silver dialed KEL 130 and smaller KSR 090 and the golden dial KEL 144 and smaller KSR 104.

Credor today is a very well recognised brand, however only recently outside of Japan. Credor always represented high level craftsmanship with unique design styles, incorporating precious metals, precious stones and unique design twists found nowhere else. The Eichi II and Fugaku are excellent albeit prohibitively expensive examples. Vintage models fortunately tend to provide astonishing value for the amount of money spent on them.

The Credor quartz connection

Knowing Seiko there is always a conection between high end models, the caliber 8J was therefore used both in Credor and Grand Seiko. The Grand Seiko SBGF with the 8J movement in general was produced from 1996 to the end of 2010, with model SBGF029 alone representing the caliber in 2009, as far as can be established. Different models saw the light of day but all were eliminated in 2009, sadly they were not produced in the same numbers in all years, as the other calibers like 9F. Some models are therefore pretty rare these days.

So, Seiko dropped the Grand Quartz brand in favor of Grand Seiko, with GS on the dial. In reviving GS as a quartz collection in 1988 with aliber 9581, it was necessary that they achieve the summit of accuracy once again and therefore among other endeavours, eventually the 8J was used from 1996 to 2011, until 9F was launched as a Grand Seiko only movement.

The 8J movement however with thirteen GS models, and Credor, representing the line is considered within Seiko to be one of the very best quartz movements, much better than the well known 9F and much more stable and accurate. It was expensive to produce and parts of the design made it hard to fit into thinner cases. The more cost effective 9F movement on the other hand is less stable, not so resistant to temperature and magnetic fields and costs about 30 percent less to produce than the 8J. But, importantly, it is thinner, and uses more common parts, therefore the frame can be used for a number of other movements and watches.

In the end the 8J, with 8J4, 8J5 and the 8J8 in Credor, is without a doubt, the most robust high accuracy quartz movement ever made. Even the fact that it had to be thicker works in its advantage resulting in even better thermo compensation performance.

The information coming from internal specs from Seiko in Japanese, on the 8J and 9F movements, is universal, saying the 8J was the last “cost be damned” very robust movement they did. The internal feeling is the 9F is less robust, less accurate, less shielded, and, yes, some of them scoff at the lack of an independent hour hand with which one easily adjusts to other time zones on the 8J5’s (not the 8J8’s).

Another fun anecdote is that the very high accuracy +- 5 second twin quartz movements that went before, were extremely expensive to produce and were not robust in field use. Their biggest problem was they tended to get fried if worn in hot baths or shower rooms - a real issue here in Japan where the harried salary man has his watch with him in the after work Sauna to benchmark the last train. The 8J was the answer to those real concerns...

Credor mechanical rises again - the Phoenix

Around 1998 Seiko called in retired watchmakers to develop the high beat caliber 6S78 chronograph as a Rolex Daytona competitor, showcasing their commitment to quality. Between 1999 and 2002 the Credor Phoenix line, usually in white and black dial variants - with the GMT column-wheel chronograph the star of the show - presents fascinating timepieces . They blend the robustness of a field watch with the elegance of a dress watch at the Grand Seiko level or above.

In general, Credor dress watches were not only part of the Phoenix line with caliber 8L75 or of the Signo and Node family using caliber 4L75 (2007 through 2013). They can also be found in the Pacifique line.

The movement however was always part of the extremely rare Seiko 4L/6L/8L family, which was similar in design to the Soprod A10 family of Swiss movements. It is exactly the same size as the popular ETA 2892A2, and has similar specifications as well, though the design is completely different. Below you will see the list of 4L75 models..

2007-2012 Credor Signo GCBW999
2007-2011 Credor Signo GCBW997
2008-2011 Credor Signo GCBW995
2008-2011 Credor Signo GCBW993
2008-2012 Credor Node GCBW991
2008-2013 Credor Node GCBW989

The movement returned in 2018 as Cal. 6L35, it was briefly used in a limited-edition Presage model, before returning to full production for Credor’s GCCD line in 2019 as Cal. 6L75. But, once more in 2021, caliber 6L35 reappeared as a King Seiko SJE083J1 3000 limited edition.

Back to the Credor Phoenix now, it was made for Japan only and in production for a very short span of time before Seiko dropped the "Phoenix” branding to concentrate on the luxury Credor range, which is still around today. The most “common” Credor Phoenix models are the 3 handers and chronographs, but there were also some retrograde models with the 4S77 movement, itself an ébauche (or caliber evolution) of the revered 4S15 Alpinist. That 4S7 movement (4S71, 4S77) by the way was also used in the more "baroque" Credor Pacifique line, like the GCBG973 or GZBG997. Below you can see a selection of the Credor Phoenix line-up (tilt phone for better table view).

Reference	Case Material	Dial Description	Type	Bracelet Type	Caliber
GCBG977	Steel	Blue (Limited to 500)	Chronograph GMT	Integrated	4S77
GCBP985	Steel	Salmon	Chronograph	Leather	6S78
GCBP989	Titanium	Black	Chronograph	Titanium	6S78
GCBP991	Steel	Kumagawa Limited Edition	Chronograph	Integrated	6S78
GCBP993	Steel	White	Chronograph	Integrated	6S78
GCBP995	Steel	Blue	Chronograph	Integrated	6S78
GCBP997	Steel	Black	Chronograph	Integrated	6S78
GCBP999	Titanium	White	Chronograph	Titanium	6S78
GCBR993	Steel	Black	Three-Hand	Leather	8L75
GCBR995	Steel	White	Three-Hand	Leather	8L75
CBGR997	Steel	Black	Three-Hand	Integrated	8L75
CBGR999	Steel	Carbon Fiber (Limited 50)	Three-Hand	Integrated	8L75
GZBP999	Steel	Carbon Fiber	Chronograph	Integrated	6S78

Limited 500, made for the FIFA world cup of 2002 Korea/Japan
Limited 50, made for Seibu department store

Based on the pricing, quality of the workmanship and the movement used in the models, it can safely be said that the Credor Phoenix originally was just below the Grand Seiko in the Seiko hierarchy. The Seiko mechanical renaissance started in 1998 with the introduction of the first modern Grand Seiko using the 9S55 caliber. The 8L35 movement (the undecorated, unadjusted version of 9S55) was introduced at the same time, probably appearing in the Credor Phoenix at this point in time - however the 8L75 for some highly limited Credors was quite another matter (more on that below).

Phoenix was in fact not dissimilar to how the Brightz/Brightz Ananta range is positioned with respects to the modern Grand Seiko today, however Credor and Galant were the only 2 ranges priced above the Grand Seiko watches at this point in time.

Based on the pricing and the time the Credor Phoenix was introduced and discontinued it is likely that it was replaced by the Brightz Phoenix range with caliber 6S28 (like the reference SAGH005 or SAGQ007) and was preceded by the Seiko Laurel range with caliber 4S15, 4S77 etc. (although Laurel was very underpriced compared to both the Credor and Brightz).

Many consider the Credor Phoenix highly collectible as they are usually very limited in numbers. For instance the GCBP991, a mechanical 6S78 chronograph, was released in 1999 as a JDM Kumakawa Limited Edition of 200 Pieces. This 38mm timepiece is nearly impossible to categorize, which is precisely what makes it so compelling. Rare, technically impressive, and aesthetically unique, it is a luxury alternative to the Rolex Daytona and a high-end evolution of Seiko’s Alpinist. Yet, it remains virtually unknown, making it one of the best-kept secrets in Japanese watchmaking.

The Credor Phoenix is always powered by high end movements, like the 4S77, 8L35, 8L75 or 6S78 chrono movements, the latter having an interesting backstory such as Tag Heuer being so impressed with its movement, that they had requested licences to adopt them for their own Carrera 1887 models.

It's a Grand seiko Field Watch

Unlike mainstream luxury sports watches, the Credor Phoenix flies under the radar, even though it has impressive lineage, starting with the Seiko Alpinist introduced in 1959. At 38mm in diameter with a 45mm lug-to-lug measurement, the Phoenix GCBR three hander range sits perfectly on the wrist, offering the same wearability and utility as an Explorer but with a lot more refinement and class. With a 100m water resistance rating, it is just as capable in outdoor settings as it is in formal environments.

From the beginning the design philosophy was clear, this was a durable yet elegant mountaineering watch, catering to Japanese hikers who needed a timepiece suitable for both the outdoors and more formal settings. So, with the Laurel Alpinist as Seiko’s first true sports watch, blending ruggedness with sophistication, there was a precedent for later models to keep raising the bar on both utility and refined class. Design cues for the Phoenix line came from that first Laurel Alpinist with the black dial and shark tooth indices, but also from the sporty Grand Seiko 8N and 8J line with the controversial cyclops and integrated bracelets and even the more brutalist King Seiko 4402-8000. With a 100m water resistance rating it was the go anywhere do it all watch.

Still, with a complex combination of brushed and high polish finishing on a stepped case design the Credor Phoenix CBGR is in a class of its own. To make a statement of this Credor presented the crown as an indigo azurite cabochon, much like Cartier’s design choices, yet it is nestled between small, functional crown guards. The CBGR range features either a leather strap or an integrated bracelet.

Grand Seiko DNA

Let's get into specifics, because a hidden gem is the movement powering the Credor Phoenix GCBR993 and 999, it is the Seiko Caliber 8L75, a high-end automatic movement derived from the Grand Seiko 9S55 and not as a downgrade either, quite the opposite. It has exceptional precision of -5/+5 seconds a day, long-term reliability and a long service service interval, also superior Grand Seiko level finishing is applied. One additional point to note is that the date changes inside of a minute to 12 midnight. This is a sign of how much attention was paid to the movement assembly.

So, unlike a typical field watch, this luxury automatic movement is finished with a level of detail that aligns with Grand Seiko, it is a true workhorse movement wrapped in an elegant package.

Design Features That Set It Apart

A Cross Between Grand Seiko, King Seiko and Alpinist

The black dial variant of the CBGR is finished in deep black Grand Seiko-like rich lacquer (CBGR993) or an untarnishable carbon fiber (CBGR999). The shark-tooth-shaped indices add a distinctive touch, these have a double function because of their shape, triangular so as to better grip the dial and of course plenty of room for Seiko's Lumibrite to keep you lit throughout the night. The red-tipped seconds hand pops against the dark dial, nearly touching the Arabic numerals on the rehaut.

The Unexpected Cyclops

One of the most polarizing features is the date magnifier. Unlike Seiko’s Alpinist, where the cyclops can feel like an afterthought, the Phoenix integrates it seamlessly, covering a brushed metal date wheel with bold black numerals that are of course very crisply applied.

A Well-Hidden Gem Worth Discovering

The Credor Phoenix GCBR is a beautiful contradiction—a watch that combines elements of Grand Seiko, Rolex, Cartier, and Seiko Alpinist into a cohesive, unique design. It’s a watch nerd’s dream, balancing refined aesthetics with tool-watch durability, making it one of the most intriguing and underappreciated luxury field watches ever made.

Should You Buy One?

If you’re looking for a rare and distinctive alternative to the Rolex Explorer or Seiko Alpinist, the Credor Phoenix GCBR999 for instance is an exceptional choice. Its Grand Seiko-level movement, luxurious details, and unique history make it a hidden treasure in the world of Japanese horology.

With so very few examples on the market (only 50 ever made), if you spot one at a reasonable price (between €1,500 and €2,800)—buy it. This is a watch that will only appreciate in value, both as a collector’s piece and as a conversation starter for true watch enthusiasts.

More on Credor Phoenix CBGR999- 50 pieces limited

In the world of luxury watches, certain models capture the imagination of collectors and enthusiasts alike. The Credor Phoenix GCBR999 is one such watch—a rare fusion of field-watch resilience and dress-watch elegance. Produced around the turn of the millennium, this enigmatic timepiece remains largely undiscovered outside Japan, making it a fascinating alternative to more mainstream luxury sports watches like the Rolex Explorer and Seiko Alpinist. With an exclusive production run of only 50 pieces (Japan only), it is one of the most intriguing hidden treasures in horology.

The unknown Phoenix

Unlike mainstream watches that dominate social media and collector discussions, the Credor Phoenix GCBR999 exists in the shadows. Consider this: while the hashtag SeikoAlpinist boasts over 52,500 hits on Instagram, CredorPhoenix has only 191. This lack of visibility speaks to its exclusivity and rarity. Originally made for Tokyo’s prestigious Seibu store in Ginza, only 50 pieces were ever produced, ensuring its place as one of the most elusive watches in Seiko’s history.

This limited-edition model was crafted at a time when forums, not social media, dictated watch trends, and as a result, its market value fluctuates wildly—ranging from €1,500 to €4,000 depending on condition and availability.

A Worthy Addition to Any Collection

If you seek a rare, well-crafted alternative to the Rolex Explorer or Seiko Alpinist, the Credor Phoenix GCBR999 is an outstanding choice. With its Grand Seiko-caliber movement, refined case and movement finishing, imbued with rich historical significance, it is a watch collector’s dream. Given their low production numbers and rising recognition, these watches will likely continue to appreciate in both value and status.

Should you encounter a Credor Phoenix GCBR999 in the wild at a reasonable price, buy it. It may just be one of the most rewarding hidden gems in the world of Japanese luxury watches.

About the Credor 8L75 Movement

The base Seiko 8L is a high-end automatic movement developed by Seiko, primarily used in their professional dive watches. It is often considered an unbranded and less decorated version of the Grand Seiko 9S55 movement.

Specifications

Type: Automatic, mechanical
Jewels: 26
Frequency: 28,800 vibrations per hour (8 beats per second)
Power Reserve: Approximately 50 hours
Accuracy: Officially rated at -10 to +15 seconds per day (real-world accuracy can be better)
Hacking Function: Yes (stops the second hand when adjusting the time)
Hand-Winding: Yes
Shock Absorption: Seiko Diashock
Manufacturing Location: Seiko Shizukuishi Watch Studio, Japan
Rotor System: Bi-directional winding system (Magic Lever)

Notable Features of 8L - 8L35, 8L75

The 8L35 is a premium movement designed specifically for Seiko’s high-end dive watches, such as the Marinemaster 300 (SBDX001, SBDX017, SBDX023, SBDX025, SBDX027).
It lacks the fine finishing and regulation found in Grand Seiko’s 9S55, making it more rugged and suited for dive watches.
The accuracy margin is wider, as it is not regulated as strictly as Grand Seiko movements.
Hand-assembled in Japan for high-quality control and reliability.

Comparison with Other Seiko Movements

Attribute	Seiko 8L35	Seiko 6R15	Grand Seiko 9S55
Jewels	26	23	26
BPH	28,800	21,600	28,800
Accuracy	-10/+15 sec/day	-15/+25 sec/day	-3/+5 sec/day
Power Reserve	50 hrs	50 hrs	50 hrs
Hacking	Yes	Yes	Yes
Hand-Winding	Yes	Yes	Yes

Comparison Credor 8L75 with Seiko 8L35: A Detailed Comparison

Seiko's 8L series movements are high-end mechanical calibers designed for professional dive watches. The 8L35 and 8L75 share many characteristics but also have key differences that set them apart.

Overview of Each Movement

Seiko 8L35

Type: Automatic, mechanical
Jewels: 26
Frequency: 28,800 vibrations per hour (8 beats per second)
Power Reserve: ~50 hours
Accuracy: -10/+15 sec per day
Shock Absorption: Seiko Diashock
Hacking Function: Yes
Hand-Winding: Yes
Manufacturing Location: Seiko Shizukuishi Watch Studio, Japan
Rotor System: Bi-directional winding system (Magic Lever)
Notable Use Case: Found in Seiko Marinemaster 300 (SBDX001, SBDX017, SBDX023, etc.)

Seiko 8L75

Type: Automatic, mechanical
Jewels: 26
Frequency: 28,800 vibrations per hour (8 beats per second)
Power Reserve: ~55 hours
Accuracy: -5/+10 sec per day (tighter tolerance than 8L35)
Shock Absorption: Seiko Diashock
Hacking Function: Yes
Hand-Winding: Yes
Manufacturing Location: Seiko Shizukuishi Watch Studio, Japan
Rotor System: Bi-directional winding system (Magic Lever)
Notable Use Case: Found in Credor, Seiko Prospex LX Line, Professional Dive watches
Finished Grand Seiko style

Key Differences 8L35 and 8L75

Attribute	Seiko 8L35	Seiko 8L75
Power Reserve	~50 hours	~55 hours
Accuracy	-10/+15 sec/day	-5/+10 sec/day
Refinement	Less refined finishing	More refined finishing
Intended Usage	High-end dive watches (Marinemaster)	Flagship professional divers (LX Series)
Regulation	Standard	More precise factory regulation

Conclusion

The 8L35 is a workhorse movement designed for professional dive watches like the Marinemaster 300. It is essentially an unbranded Grand Seiko 9S55 movement with slightly less refinement and regulation.
The 8L75 is an evolution of the 8L35, featuring better accuracy, more refined finishing, slightly increased power reserve, and more precise regulation.
If you need a professional dive movement with greater precision and longer-lasting power, the 8L75 is the superior choice.
If you prefer reliability, durability, and slightly more affordable professional-grade dive movements, the 8L35 remains a strong contender.