Seiko Cal. 6636 - 779

Seiko 6636-779

This Spring Drive model from 1972 features a 42mm Two-Tone case. With its 21mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-c1a46388ed6a]

Also known as: Sea Horse

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
42mm
Case Thickness
8.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Silver
Jewels
36j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1972

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