Seiko Seiko 5 Sports SRPH71K1vsSeiko SRPC31J1
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Seiko 5 Sports SRPH71K1

SRPC31J1
Diameter
42.5mm
42mm
Lug-to-Lug
46mm
n/a
Thickness
13.5mm
12.1mm
lowest
Water Resistance
100m
100m
Power Reserve
41h
41h
MSRP
$405
$390
lowest
Movement
Seiko 4R36
Seiko 4R35
Case
5 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely expect the Seiko 5 Sports SRPH71K1 to be reliable and well-made, with one owner noting it makes a good starting point for a collection and another calling them solid "beaters" that can withstand abuse. One owner reports multiple quality control issues within four months, including bezel and chapter ring misalignment, stating that such misalignments are common in Seiko bezels and chapter rings. The watch has 100m water resistance, suitable for casual wear but not serious diving due to its non-screw-down crown. An owner notes the SRPH71K1 can be purchased at Costco for a significant discount, nearly $200 less than MSRP. The Seiko 5 Sports SRPH71K1 sits very high on the wrist due to its automatic movement. On balance, owners value the Seiko 5 Sports SRPH71K1 for its potential reliability and "beater" status, though some have encountered quality control issues with alignment.
Owners widely praise the Seiko SRPC31J1's dynamic sunburst dial, which appears richer in person than in photographs, and its reliable lume that glows brightly after brief light exposure. Some owners appreciate the 38mm case size, finding it very wearable, especially on smaller wrists, and note the dial color is a darker blue than often depicted. One owner points out that the lume on the seconds hand's ball does not match the dial's hue. The 4R35 movement is described as a solid workhorse. On balance, owners rate the Seiko SRPC31J1 highly for its wearable size and vibrant dial at its current pricing.
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