Seiko Cal. 6397 - 857

Seiko 6397-857

This Automatic model from 1977 features a 36mm Stainless Steel case. Powered by the 6397 caliber with 21j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-94f1bd3c985f]

Also known as: Bullhead

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
14.4mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Black
Jewels
21j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1977

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