Seiko Cal. 3831 - 311

This Spring Drive model from 1971 features a 39mm Hardlex-Coated Steel case. It features a Black dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-6d736e543dce]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1971

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