Seiko Cal. 6635 - 436

Seiko 6635-436

This Automatic model from 1976 features a 38mm Titanium case. Powered by the 6635 caliber with 29j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-0b35a4720e34]

Also known as: Bullhead, Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
38mm
Case Thickness
10.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Silver
Jewels
29j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1976

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