Seiko Cal. 3831 - 654

This Hand-Winding model from 1969 features a 38mm Titanium case. Powered by the 3831 caliber with 35j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-737514c8ed74]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1969

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