Seiko Cal. 3861 - 531

This Spring Drive model from 1983 features a 40mm Stainless Steel case. It features a White dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-a0a05d0b7db7]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1983

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