Seiko Cal. 3831 - 540

This Automatic model from 1976 features a 35mm Stainless Steel case. Powered by the 3831 caliber with 22j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-e8e4a2fd06a3]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1976

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