Seiko Cal. 6231 - 879

Seiko 6231-879

This Automatic model from 1968 features a 37mm Stainless Steel case. Powered by the 6231 caliber with 35j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-4a4dd192152b]

Also known as: Monster, Sumo

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
13.1mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1968

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