Seiko Cal. 3831 - 691

This Hand-Winding model from 1976 features a 35mm Two-Tone case. Powered by the 3831 caliber with 18j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-23a3de6085a7]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1976

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