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Grand Seiko Heritage Collection 25th Anniversary Limited Edition 37mm Stainless Steel
Ref. SBGH311
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Stepping up in Grand Seiko's range
The SBGH311 was made to mark the 25th anniversary of Grand Seiko's 9S calibre family, and its dimensions are a deliberate echo of the SBGR001 — the 1998 watch that started it all. At 37mm with a lug-to-lug of 44.6mm, it wears with the compact, centred feel of that original rather than the broader proportions that have become common since. Only 1,200 were made. The dial is the thing to understand before anything else. Grand Seiko calls it "Sea of Clouds," and it was produced by electroforming to capture the texture of Mt. Iwate at daybreak — a surface that shifts from flat silver to something close to three-dimensional depending on where the light comes from. The case wears the Zaratsu polish Grand Seiko is known for, and at 13.3mm the watch sits noticeably tall for its footprint, a consequence of the 9S85 running at 36,000 vph inside it. That movement is assembled by hand at the Studio Shizukuishi, and its accuracy of +5 to -3 seconds per day per day is rated under static conditions — in practice, one of the more precise mechanicals of its type. Through the caseback, the rotor is finished in anodised titanium to a vivid sky blue. The bracelet adjusts via half-links rather than a micro-adjust mechanism, so fit takes a little more care to set, but once settled it wears well with both polished and brushed surfaces across its width.
- Reference
- SBGH311
- Brand
- Grand Seiko
- Case size
- 37mm
- Case thickness
- 13.3mm
- Lug width
- 19mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Silver
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- 9S85
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Three-fold clasp
- Lume
- Luminous
- Condition
- Pre-owned
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 44.6mm
- Power reserve
- 55 hours
Learn more about Grand Seiko
Grand Seiko began in 1960 as Seiko's attempt to build a watch to the highest standard in the world, judged against Swiss chronometer criteria rather than Japanese ones. The first model met the Bureaux Officiels standard, and the ambition was explicit: not a good Japanese watch, but a better watch than the Swiss were making.
The 1967 Grammar of Design, laid down by Taro Tanaka, still governs the aesthetic. Flat surfaces and sharp facets rather than curves; hands and markers cut to catch light in defined planes; every surface either mirror-polished or perfectly flat, with no in-between. The polishing is done by hand on tin plates — Zaratsu — which produces distortion-free reflections and cannot be replicated by machine.
The precision case was made at observatory trials in the 1960s, where Grand Seiko movements placed among the leaders in Geneva and Neuchâtel before the competitions ended.
The house's distinctive technology is Spring Drive, introduced in 1999 after nearly three decades of development. A conventional mainspring drives the watch, but the escapement is replaced by an electromagnetic brake regulated by a quartz oscillator: mechanical power, quartz accuracy, and a seconds hand that sweeps without ticking at all.
Grand Seiko was separated into a standalone brand internationally in 2017, with dials frequently drawn from Japanese landscape — the Snowflake among the best known.
- 1960
- The first Grand Seiko is built to Swiss chronometer standards.
- 1967
- Taro Tanaka codifies the Grammar of Design.
- 1968
- The 61GS Hi-Beat reaches 36,000 vibrations per hour.
- 1999
- Spring Drive combines mechanical power with quartz regulation.
- 2017
- Established as an independent brand worldwide.
Also in 5 collections
This watch appears in Stainless Steel Watches (2,846), Automatic Watches (1,468), Silver Dial Watches (638), Pre-Owned, Ex-Display & Vintage Watches (271) and Limited Edition Watches (171).
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 37mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | SBGH311 | M28503-0007 | 03.9400.670 |
|---|---|---|---|
| Price | £4,450 | £3,050 | £5,950 |
| Case size | 37mm | 38mm | 36mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | 55 hours | 38 hours | — |
| This watch |
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|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How long does it run for when it's not worn?
About 55 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
What size strap does it take?
19mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 44.6mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as men's, though at 37mm it sits in the range that suits anyone.
Cheapest place to buy
Mappin & Webb at £4,450, pre-owned. No UK retailer we track lists this reference new.
Is this available new?
Not from the UK retailers we track. This reference is listed as pre-owned only, at £4,450 from Mappin & Webb. A pre-owned watch has been worn, and is normally sold under the retailer’s own warranty rather than the manufacturer’s.
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