Seiko Cal. 6638 - 136

Seiko 6638-136

This Spring Drive model from 1976 features a 37mm Two-Tone case. With its 18mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-11af12c1be98]

Also known as: Navigator

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
37mm
Case Thickness
13.0mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
130m
Dial Color
Navy
Jewels
21j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1976

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