Seiko Cal. 6637 - 503

Seiko 6637-503

This Quartz model from 1979 features a 39mm Hardlex-Coated Steel case. Powered by the 6637 caliber with 30j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-17a19fb2dd87]

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
15.2mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Black
Jewels
30j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1979

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seikata-wm-17a19fb2dd87