Seiko Cal. 3887 - 677

This Spring Drive model from 1972 features a 37mm Stainless Steel case. It features a Black dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-2ffd87f51862]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1972

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