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Seiko 4R Red 'Shog-urai' Diver 41.7mm Mens Watch
Ref. SRPL11K1
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A hybrid design drawing on two of Seiko's most recognisable diver silhouettes, the SRPL11K1 wears its angular geometry deliberately. The steeply angled lugs sit across a 41.7mm stainless steel case, 12.3mm thick with a 49.5mm lug-to-lug span, fitted with a screw-down crown and screw case back. The unidirectional rotating bezel carries a LumiBrite pip, while the red dial pairs pointed hands and index markers — all lumed — with a date window positioned between four and five o'clock. A stainless steel bracelet with three-fold clasp and dive extender completes the watch, rated to 200 metres. The 4R35 automatic runs at 21,600vph with a 41-hour power reserve.
- Reference
- SRPL11K1
- Brand
- Seiko
- Collection
- Prospex
- Case size
- 41.7mm
- Case thickness
- 12.3mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Red
- Crystal
- Hardlex
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- 4R35
- Functions
- Date
- Water resistance
- 200m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Three-fold clasp
- Lume
- LumiBrite
- Retailer
- F.Hinds
Additional specifications
- Lug-to-lug
- 49.5mm
- Power reserve
- 41 hours
- Weight
- 158g
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 the Seiko Prospex range (32), Stainless Steel Watches (3,088), Automatic Watches (1,763), Sports Watches (794), Dive Watches (567) and Watch Price Drops (290).
Manufacturer’s guarantee
Best of 2 retailers
Price history
This watch is currently at its lowest recorded price. It reached £580 on 5 September. Prices are checked every day, and we record any changes.
Seiko 4R Red 'Shog-urai' Diver alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | SRPL11K1 | 98A325 | GM-B2100BD-1AER |
|---|---|---|---|
| Price | £560 | £599 | £549 |
| Case size | 41.7mm | 41mm | 44mm |
| Water resistance | 200m | 200m | 200m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Fabric strap | Stainless steel bracelet |
| Power reserve | 41 hours | 60 hours | — |
| This watch | Closely matched |
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 200m it is rated for swimming, snorkelling and recreational 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 49.5mm, 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.
Cheapest place to buy
F.Hinds at £560, against £580 at Mappin & Webb. Two UK retailers stock this reference.
Has the price changed recently?
It's currently at its lowest recorded price since we began tracking it. It's ranged between £560 and £580, today it's £560.
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