Seiko Cal. 6636 - 935

Seiko 6636-935

This Quartz model from 1968 features a 38mm Titanium case. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-31e51b82e663]

Also known as: Tuna, World Timer

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
38mm
Case Thickness
12.2mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Silver
Jewels
21j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1968

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