Seiko Cal. 6634 - 771

Seiko 6634-771

This Automatic model from 1975 features a 39mm Stainless Steel case. Powered by the 6634 caliber with 21j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-22087ef730d1]

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
14.7mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Green
Jewels
21j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1975

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seikata-wm-22087ef730d1