Seiko Cal. 3831 - 964

The Seiko 3831-964 represents an important milestone in Seiko's 1977 lineup. Powered by the 3831 caliber with 31j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-b98cb2176e7d]

Also known as: Bullhead, Crown

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1977

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