Kensington Watches
Seiko 5 Sports SRE003K1 'Compact' Bracelet Watch - W78106

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Seiko

Seiko 5 Sports SRE003K1 'Compact' Bracelet Watch - W78106

Ref. SRE003K1

Among our 203 Seiko watchesThis watch£270
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Stepping up in the same dial colour

Price range £110 to £3,550 across 203 Seiko watches in stock.

The Seiko 5 has carried the same five commitments — automatic movement, day-date display, water resistance, recessed crown, durable case and bracelet — for over half a century, and this compact variant applies them without compromise to a 28mm case. That sizing deliberately broadens the collection beyond its traditional wrist, offering the same tool-watch credentials in a proportion that suits a narrower wrist as well as it suits anyone drawn to a smaller, less conspicuous wear. At 28mm the watch sits quietly on the wrist, but the blue dial catches light in a way that stops it reading as merely modest, and the LumiBrite on the hands and indices means legibility holds well into the evening. The 2R06 movement is Seiko's dependable workhorse at this tier — self-winding, running a 41-hour reserve, and protected behind a screwcase back that keeps the whole thing coherent with its 100-metre rating.

Reference
SRE003K1
Brand
Seiko
Case size
28mm
Case thickness
11.19mm
Lug width
14mm
Case material
Stainless steel
Dial
Blue
Crystal
Hardlex
Movement
Automatic
Calibre
2R06
Functions
Day-date
Water resistance
100m
Bracelet / strap
Stainless steel bracelet
Strap colour
Silver
Lume
LumiBrite
Retailer
F.Hinds
Additional specifications
Power reserve
41 hours
Weight
69g
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 (5,420), Stainless Steel Watches (3,525), Watches Under 37mm (1,891), Automatic Watches (1,862), Blue Dial Watches (982) and Automatic Watches Under £500 (385).

Manufacturer’s guarantee

What the specifications mean

A mechanical watch for everyday wear.

Strengths

  • 100m water resistance covers swimming and watersports
  • 28mm wears small and slips under any cuff
  • Luminous hands and markers for low light
  • Sits in the lower half of Seiko's range as we list it
Best forSwimmingSmall wristsEveryday wear

Price history

This watch is currently at its highest recorded price. It was £250 on 27 August. Prices are checked every day, and we record any changes.

£270£27027 August

Seiko 5 Sports SRE003K1 'Compact' alternatives

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

5 Sports SRE003K1 'Compact' Bracelet Watch - W78106 compared with 2 alternatives from other brands
SpecificationThis watch5 Sports SRE003K1 'Compact' Bracelet Watch - W78106SRE003K1FossilME3272 Carraway Automatic Brown Leather Strap Watch - W10456ME3272BulovaCrystal 96X149 Necklace, Earrings And Watch Gift Set - W8314596X149
Price£270£239£199
Case size28mm30mm29mm
Water resistance100m50m30m
MovementAutomaticAutomaticAutomatic
StrapStainless steel braceletLeather strapStainless steel bracelet
Power reserve41 hours——
This watch
  • Rated shallower
  • Wears larger
  • Costs less
  • Rated shallower

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?

14mm. 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.

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

Listed as unisex, and at this size it suits any wrist that takes the dimensions.

Cheapest place to buy

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

Has the price changed recently?

It's currently at its highest recorded price. It's ranged between £250 and £270, today it's £270.

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