Seiko Cal. 5631 - 374

This Spring Drive model from 1999 features a 38mm PVD Black case. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-b040f9cd008e]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1999

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