Seiko Cal. 3840 - 729

This Quartz model from 1979 features a 41mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-bd87f6438a33]

Also known as: Sumo, Shogun

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1979

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