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Grand Seiko Sport Collection 39mm Mens Watch
Ref. SBGN029
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Stepping up in the same colour and case shape
The 9F86 sits at the top of Grand Seiko's quartz range, built to a tolerance that most mechanical watches cannot match and that virtually no other quartz movement approaches: ±10 seconds across an entire year. That accuracy is paired here with a flyer GMT — the local hour hand jumps in whole increments independently, so crossing time zones mid-flight leaves the running seconds untouched and the home time readable at a glance on the red hand. At 39mm with a lug-to-lug of 45.9mm and a case sitting just 12.3mm tall, this wears closer to a dressed sports watch than to anything that announces itself. The navy sunray dial shifts considerably under different light, and the red GMT hand reads instantly against it without feeling decorative. Zaratsu-polished flanks sit alongside hairline-finished surfaces in the way Grand Seiko consistently applies to steel — the contrast is subtle enough to notice only when the light catches it correctly, which is often the more interesting arrangement.
- Reference
- SBGN029
- Brand
- Grand Seiko
- Collection
- SportCase Size: 39
- Case size
- 39mm
- Case thickness
- 12.3mm
- Lug width
- 19mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Quartz
- Calibre
- 9F86
- Functions
- GMT, Date
- Water resistance
- 200m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- LumiBrite
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 45.9mm
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 6 collections
This watch appears in Stainless Steel Watches (2,484), Back in Stock (1,176), Blue Dial Watches (696), Sports Watches (649), Dive Watches (461) and GMT Watches (185).
What the specifications mean
A watch built to be worn hard and got wet.
Strengths
- 200m water resistance, rated for actual diving
- 39mm suits most wrists
- 45.9mm lug-to-lug keeps the 39mm case wearable
- 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 | SBGN029 | L45230902 | T9264107626101 |
|---|---|---|---|
| Price | £3,300 | £3,450 | £2,740 |
| Case size | 39mm | 39mm | 40mm |
| Water resistance | 200m | 30m | 30m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Stainless steel bracelet | Leather strap | Leather strap |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 200m it is rated for swimming, snorkelling and recreational diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
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 45.9mm, 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 39mm it sits in the range that suits anyone.
Cheapest place to buy
Mappin & Webb is the only UK retailer we track stocking this reference new, at £3,300. There is nothing to compare it against today.
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