Seiko Cal. 5631 - 964

Seiko 5631-964

This Quartz model from 1978 features a 37mm Hardlex-Coated Steel case. Powered by the 5631 caliber with 32j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-36fb2d531ab2]

Also known as: Shogun, Bullhead

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
8.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
White
Jewels
32j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1978

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