Seiko Cal. 6643 - 959

Seiko 6643-959

This Automatic model from 1974 features a 36mm Hardlex-Coated Steel case. Powered by the 6643 caliber with 31j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-adba74969ab8]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
14.5mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
120m
Dial Color
White
Jewels
31j
Frequency
36,000 bph
Power Reserve
57 hours
Year
1974

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