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Seiko 5 Sports SRPH71K1
$405Stock unknown
Case
- Diameter
- 42.5mm
- Thickness
- 13.5mm
- Lug-to-lug
- 46mm
- Water resistance
- 100m
Crystal & dial
- Crystal
- Hardlex
- Dial color
- Blue
- Lume
- LumiBrite
Movement
- Caliber
- Seiko 4R36
- Type
- Automatic
- Power reserve
- 41h
- Complications
- Day, Date
Seiko
Seiko's day-date automatic caliber and the in-house branded version of the NH36 with stricter quality control and finishing. The additional day wheel over the 4R35 adds the day-of-week complication without changing the movement dimensions. Found extensively in the Seiko 5 Sports and Prospex lines, it offers Seiko's proven reliability with the convenience of day-date display at a mainstream price point.
5 Sports collection · 5 watches
Market
Retail$405
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Retail stock & market context
Seiko on the secondhand market
+10.3%
2026 so far · +6.0% to +16.9% · 91 matched watches
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Summary
The Seiko 5 Sports SRPH71K1 is an automatic watch, with a 42.5mm case, 13.5mm thick, powered by the Seiko 4R36 movement and a 41-hour power reserve. Water resistance is rated to 100m, under a hardlex crystal, with day, date complications. Manufacturer MSRP is $405. The dial color is blue.
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