Seiko Cal. 3831 - 191

This Hand-Winding model from 1974 features a 38mm Titanium case. It features a Black dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-84d80e329b76]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1974

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