Seiko Cal. 5678 - 777

This Hand-Winding model from 1976 features a 40mm Stainless Steel case. It features a Green dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-70b653936bca]

Also known as: Monster, Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1976

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