Seiko Cal. 6642 - 402

Seiko 6642-402

This Hand-Winding model from 1981 features a 40mm Hardlex-Coated Steel case. Powered by the 6642 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-4abd4b76b8fc]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.2mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Navy
Jewels
21j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1981

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