Seiko Cal. 5631 - 851

Seiko 5631-851

This Hand-Winding model from 1988 features a 42mm PVD Black case. Powered by the 5631 caliber with 36j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-39064d96d99a]

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
42mm
Case Thickness
10.6mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
180m
Dial Color
Cream
Jewels
36j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1988

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seikata-wm-39064d96d99a