Seiko Cal. 5631 - 609

Seiko 5631-609

This Solar model from 1969 features a 40mm Hardlex-Coated Steel case. Powered by the 5631 caliber with 29j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-38b022218e02]

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.6mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Black
Jewels
29j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1969

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