Seiko Cal. 6636 - 397

Seiko 6636-397

This Hand-Winding model from 1978 features a 39mm Titanium case. With its 20mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-dd6c274b7251]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
39mm
Case Thickness
11.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
33j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1978

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