Grand Seiko Heritage "Taisetsu"
The SBGA415 reworks the case of the 62GS, Grand Seiko's first automatic of 1967, whose defining trait is the absence of a bezel: the crystal is fixed straight to the case, which thins the look and lets light reach the dial from more angles. Grand Seiko has refined the wearability and the crown for today. The light grey dial depicts Shinshu, where Spring Drive watches are made, under the deep snow of Taisetsu, one of the 24 traditional seasonal phases of the Japanese year. It was first part of a US-only four-seasons collection before going worldwide. Inside is the 9R65, the first Grand Seiko Spring Drive calibre, with a power-reserve indicator, about 72 hours and plus or minus 15 seconds a month, shown through a sapphire back. The case and bracelet are high-intensity titanium, 40 mm across, 47 mm lug to lug and 12.8 mm thick under a box-shaped sapphire, and the watch weighs 102 g.
Written 28 September 2026 from Grand Seiko and Monochrome.
- Reference
- SBGA415
- Type
- Dress
- Case diameter
- 40.0 mm
- Thickness
- 12.8 mm
- Lug-to-lug
- 47 mm
- Origin
- Japan
- Movement
- Spring Drive (automatic)
- Caliber
- Caliber 9R65
- Power reserve
- 72 h
- Complications
- Date, Power reserve
- Colour
- Grey
- Surface treatment
- None (alloy ~ harder than steel)
- Finish technology
- Natural finish
- Caseback
- Sapphire
- Nickel-free
- Maker states none
- Bracelet / strap
- High-Intensity Titanium bracelet, folding clasp with push-button release
- Matching bracelet
- Standard
- Crystal
- Box-shaped sapphire, anti-reflective inside
- Display back
- Yes
- Dial
- Winter grey
- Dial colours
- Grey
- Lume
- Limited
- Availability
- Offered
- Status
- Current
- Not published
- Hardness, Construction
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Frequently asked questions
Is the Grand Seiko Heritage "Taisetsu" nickel-free?
On the maker's published specification, nothing that touches the skin is steel: the case, caseback, crown and bracelet with its clasp are all non-steel. The guide records what the maker publishes and has not tested the watch, so if you react to nickel, confirm the contact points with the maker before buying.
What grade of titanium is the Grand Seiko Heritage "Taisetsu"?
The maker confirms titanium but does not publish a grade. The maker calls the material High-Intensity Titanium. The caseback is sapphire.
What size is the Grand Seiko Heritage "Taisetsu"?
The case is 40 mm across, 12.8 mm thick and 47 mm from lug to lug. It is water resistant to 100 m.
How much does the Grand Seiko Heritage "Taisetsu" weigh?
About 102 g on its bracelet.
How much does the Grand Seiko Heritage "Taisetsu" cost, and is it available?
It is in production, at a list price of $7,200.
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