Seiko Cal. 5631 - 659

Seiko 5631-659

This Hand-Winding model from 1985 features a 41mm Titanium case. Powered by the 5631 caliber with 21j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-cf62d54af76d]

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
41mm
Case Thickness
13.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Navy
Jewels
21j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1985

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