Seiko Cal. 6638 - 163

Seiko 6638-163

This Spring Drive model from 1967 features a 43mm Hardlex-Coated Steel case. With its 21mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-98932087d394]

Also known as: Silverwave

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
13.0mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
100m
Dial Color
White
Jewels
20j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1967

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seikata-wm-98932087d394