Seiko Cal. 6636 - 641

Seiko 6636-641

This Quartz model from 1974 features a 42mm PVD Black case. With its 19mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-3dd7f6a47958]

Also known as: World Timer

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
42mm
Case Thickness
11.1mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Silver
Jewels
34j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1974

Related Models

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