Seiko Cal. 3831 - 931

This Automatic model from 1981 features a 42mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-3a51c06c4e1f]

Also known as: Turtle, Goldfeather

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1981

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