Seiko Cal. 5631 - 393

Seiko 5631-393

This Hand-Winding model from 1980 features a 45mm PVD Black case. With its 19mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-39648780c005]

Also known as: Monster, Sumo

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
45mm
Case Thickness
9.0mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
190m
Dial Color
Black
Jewels
35j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1980

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seikata-wm-39648780c005