Seiko Cal. 6636 - 331

Seiko 6636-331

This Automatic model from 1973 features a 41mm Hardlex-Coated Steel case. With its 19mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-bf2f1aa5e15c]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
14.5mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Black
Jewels
22j
Frequency
36,000 bph
Power Reserve
42 hours
Year
1973

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