Seiko Cal. 5631 - 734

Seiko 5631-734

This Quartz model from 1991 features a 44mm Hardlex-Coated Steel case. With its 21mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-65fbe3589e5b]

Also known as: Sumo, Helmet

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
12.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
160m
Dial Color
Silver
Jewels
34j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1991

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seikata-wm-65fbe3589e5b