Seiko Cal. 5639 - 242

Seiko 5639-242

This Quartz model from 1972 features a 42mm Stainless Steel case. Powered by the 5639 caliber with 25j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-a5123f06f8cf]

Also known as: Sumo, Sea Horse

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
15.1mm
Lug Width
19mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
50m
Dial Color
Black
Jewels
25j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1972

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