Kensington Watches
Seiko 5 Sports Field Series 39.5mm Mens Watch Black

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Seiko

Seiko 5 Sports Field Series 39.5mm Mens Watch Black

Ref. SRPG27K1

Among our 166 Seiko watchesThis watch£290
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Stepping up in the same colour and case shape

Price range £110 to £2,900 across 166 Seiko watches in stock.

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.

All Seiko watches

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
Best forSwimmingEveryday wear

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.

£290£29010 August

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.

5 Sports Field Series 39.5mm Mens Watch Black compared with 2 alternatives from other brands
SpecificationThis watch5 Sports Field Series 39.5mm Mens Watch BlackSRPG27K1RotaryRGB10037/04 Seamatic 100 GMT Automatic Bracelet Watch - W13315RGB10037/04CasioEdifice EFK-200D-4AER Auto Red Electroform Dial Bracelet Watch - W17598EFK-200D-4AER
Price£290£289£290
Case size39.4mm40mm38mm
Water resistance100m100m100m
MovementAutomaticAutomaticAutomatic
StrapStainless steel braceletStainless steel braceletStainless steel bracelet
Power reserve41 hours42 hours
This watchClosely matchedClosely 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 explained

Will 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 compared

Does 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 compared

How 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 wrist

Is 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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