Seiko Cal. 6391 - 572

Seiko 6391-572

This Spring Drive model from 1976 features a 40mm Stainless Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5e779450aac4]

Also known as: Monster, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
12.0mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
90m
Dial Color
Burgundy
Jewels
24j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1976

Related Models

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