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Seiko 5 Sports SRE003K1 'Compact' Bracelet Watch - W78106
Ref. SRE003K1
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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.
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
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.
Will the glass scratch?
It resists most everyday knocks. Hardlex is a hardened mineral glass — tougher than standard mineral, softer than sapphire.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
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.
Who are F.Hinds?
F.Hinds has been run by the same family since 1856 and is now in its fifth generation, with more than 115 shops across England and Wales. They are a member of the Responsible Jewellery Council and an Authorised Diamond Dealer.
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