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Grand Seiko Heritage 40mm Mens Watch White
Ref. SLGH013
Sits in Grand Seiko’s upper tier here — more premium than three quarters of the Grand Seiko watches we list, which start at £2,300.
Price range £2,300 to £10,500 across 25 Grand Seiko watches in stock.The SLGH013 is a direct descendant of the 44GS, the 1967 design that codified what Grand Seiko calls its own style: flat planes meeting at sharp angles, every surface either a mirror or a brushed matte, the geometry arranged specifically to catch and redirect light. That case language is carried forward here intact, cut from Ever-Brilliant Steel — an alloy with markedly stronger corrosion resistance than standard steel and a perceptibly whiter lustre — used for the first time across both the case and bracelet in a mainstream Grand Seiko production. The dial reads as a topographic record of Mt. Iwate in early spring, the mountain that overlooks the Shizukuishi studio where the watch was made. The ice-blue texture shifts as the light changes, and the hands and indices — diamond-cut, razor-edged, carrying no applied lume — rely entirely on their geometry to remain legible, the widened twelve-o'clock index giving the eye an immediate anchor at any angle. At 11.7mm thick, the 44GS case sits closer to the wrist than its presence suggests, helped considerably by the 9SA5: a movement Grand Seiko built to advance the escapement itself, running at 36,000 vibrations per hour via a Dual Impulse Escapement and free-sprung balance, with an 80-hour reserve that reflects how much engineering headroom the calibre was given.
- Reference
- SLGH013
- Brand
- Grand Seiko
- Collection
- Heritage
- Case size
- 40mm
- Case thickness
- 11.7mm
- Lug width
- 19mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- 9SA5
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Three-fold clasp
- Lume
- Luminous
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 47.2mm
- Power reserve
- 80 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 1 collection
This watch appears in the Grand Seiko Heritage range (7).
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 40mm suits most wrists
- Sapphire crystal, which resists scratching
- 80-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
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.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 80 hours fully wound — enough to sit off the wrist over a weekend and still be running.
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 47.2mm, which suits wrists from roughly 16.5cm (6½ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's, though at 40mm it sits in the range that suits anyone.
Cheapest place to buy
Mappin & Webb is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.