Seiko Cal. 3831 - 906

The Seiko 3831-906 represents an important milestone in Seiko's 1993 lineup. Powered by the 3831 caliber with 25j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-ef91813a9589]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1993

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