Seiko Cal. 6637 - 491

Seiko 6637-491

This Solar model from 1966 features a 43mm Hardlex-Coated Steel case. Powered by the 6637 caliber with 28j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-e28d02bf303e]

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
12.9mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
140m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1966

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