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Seiko 5 Sports Field Series 39.5mm Mens Watch Black
Ref. SRPG27K1
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Stepping up in the same colour and case shape
The 39.4mm 316L stainless steel case carries a bead-blasted matte finish and measures 13.2mm thick, with a lug-to-lug span of 48.1mm that keeps it proportionate on the wrist. A curved Hardlex crystal sits over a matte black dial laid out with applied Arabic numerals, an inner 24-hour military scale, and a day-date window at three o'clock. LumiBrite coats the silver hands and markers throughout. The 4R36 automatic movement offers manual winding, a hacking seconds function, and around 41 hours of power reserve. An oyster-style three-link bracelet with a push-button three-fold clasp completes the watch, and water resistance runs to 100 metres.
- Reference
- SRPG27K1
- Brand
- Seiko
- Case size
- 39.4mm
- Case thickness
- 13.2mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Hardlex
- Movement
- Automatic
- Calibre
- 4R36
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Three-fold clasp
- Lume
- LumiBrite
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 48.1mm
- Power reserve
- 41 hours
Learn more about Seiko
Kintaro Hattori opened a watch and clock shop in Tokyo in 1881, aged twenty-one, and began manufacturing under the name Seikosha — roughly, house of exquisite workmanship — in 1892. The Seiko name appeared on watches from 1924.
The company's significance is that it broke the Swiss monopoly twice. First on precision: Seiko was appointed official timekeeper of the 1964 Tokyo Olympics and built the quartz chronometers and printing timers to do it, and in the 1960s its movements placed highly at the Neuchâtel and Geneva observatory trials against the best Swiss houses.
Then on technology. On Christmas Day 1969 Seiko released the Astron, the world's first quartz wristwatch, accurate to five seconds a month where mechanical watches managed that per day. The consequences for Switzerland were catastrophic — employment in the Swiss industry fell by roughly two-thirds over the following decade. Seiko deliberately did not enforce its quartz patents, allowing the technology to spread.
The same year it produced the 6139, among the first automatic chronographs, and it has since introduced Kinetic, Spring Drive — a hybrid regulating a mechanical mainspring electronically, giving a perfectly gliding seconds hand — and its own dive and field lines.
Seiko remains fully vertically integrated, making its own hairsprings, quartz crystals, and even the Zaratsu-polished cases, at price points from under a hundred pounds upward.
- 1881
- Kintaro Hattori opens his Tokyo shop.
- 1924
- The first watches carry the Seiko name.
- 1964
- Official timekeeper of the Tokyo Olympics.
- 1969
- The Astron becomes the first quartz wristwatch.
- 1999
- Spring Drive enters production.
Also in 6 collections
This watch appears in Back in Stock (3,434), Stainless Steel Watches (2,782), Automatic Watches (1,540), Sports Watches (700), Automatic Watches Under £500 (306) and Field Watches (51).
Manufacturer’s guarantee
Best of 2 retailers
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 39.4mm suits most wrists
- Luminous hands and markers for low light
- Sits in the lower half of Seiko's range as we list it
Price history
This watch is currently at its highest recorded price. It was £220 on 12 August. Prices are checked every day, and we record any changes.
Seiko 5 Sports Field Series alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | SRPG27K1 | RGB10037/04 | EFK-200D-4AER |
|---|---|---|---|
| Price | £290 | £289 | £290 |
| Case size | 39.4mm | 40mm | 38mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | 41 hours | — | 42 hours |
| This watch | Closely matched | Closely matched |
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?
It resists most everyday knocks. Hardlex is a hardened mineral glass — tougher than standard mineral, softer than sapphire.
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 41 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
What size strap does it take?
20mm. 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 48.1mm, 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 39.4mm it sits in the range that suits anyone.
Cheapest place to buy
Both Goldsmiths and Mappin & Webb list it at £290, so choose on delivery and warranty rather than price.
Has the price changed recently?
It's currently at its highest recorded price. It's ranged between £220 and £290, today it's £290.
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