Seiko Cal. 6391 - 986

Seiko 6391-986

The Seiko 6391-986 represents an important milestone in Seiko's 1976 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-a020711341e2]

Also known as: Sumo, Bullhead

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
46mm
Case Thickness
14.2mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Silver
Jewels
35j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1976

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seikata-wm-a020711341e2