Kensington Watches
Seiko 5 Sports SRPD71K2 Men's Watch – 42.5mm Blue Dial Silicone

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Seiko

Seiko 5 Sports SRPD71K2 Men's Watch – 42.5mm Blue Dial Silicone

Ref. SRPD71K2

Among our 202 Seiko watchesThis watch£299
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Stepping up in the same colour and case shape

Price range £110 to £3,550 across 202 Seiko watches in stock.

The cushion-shaped case sits at 42.5mm, a size that fills the wrist without feeling unwieldy. Seiko's familiar sports proportions are well balanced here, with the lugs keeping things compact enough for everyday wear. The blue dial is the natural focal point, giving the watch a clean, direct character that works across casual settings without drawing too much attention to itself. The silicone strap keeps the overall look unfussy and comfortable against the skin. Automatic movement means no battery to consider, just a watch that runs as long as it is worn.

Reference
SRPD71K2
Brand
Seiko
Case size
42.5mm
Case material
Stainless steel
Case shape
Round
Dial
Blue
Crystal
Hardlex
Bezel
Unidirectional rotating
Movement
Automatic
Calibre
4R36
Functions
Date
Water resistance
100m
Bracelet / strap
Silicone strap
Strap colour
Black
Clasp
Buckle
Lume
Luminous
Retailer
Watch Enclave
Additional specifications
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 5 collections

This watch appears in Back in Stock (4,815), Stainless Steel Watches (3,155), Automatic Watches (1,641), Blue Dial Watches (873) and Automatic Watches Under £500 (375).

International shipping available

What the specifications mean

A mechanical watch for everyday wear.

Strengths

  • 100m water resistance covers swimming and watersports
  • Luminous hands and markers for low light
  • Sits in the lower half of Seiko's range as we list it
Best forSwimming

Seiko 5 Sports SRPD71K2 alternatives

Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.

5 Sports SRPD71K2 Men's Watch – 42.5mm Blue Dial Silicone compared with 2 alternatives from other brands
SpecificationThis watch5 Sports SRPD71K2 Men's Watch – 42.5mm Blue Dial SiliconeSRPD71K2MaseratiR8821108036 Potenza Automatic Men's WatchR8821108036RotaryRGS10006/01 Seamatic Eclipse Automatic Brown Leather Strap Watch - W13305RGS10006/01
Price£299£299£299
Case size42.5mm43mm43mm
Water resistance100m100m100m
MovementAutomaticAutomaticAutomatic
StrapSilicone strapLeather strapLeather strap
Power reserve41 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.

Is it a men's or women's watch?

Listed as men's.

Cheapest place to buy

Watch Enclave is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.

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