Seiko Cal. 3871 - 991

This Quartz model from 1968 features a 45mm Hardlex-Coated Steel case. It features a Silver dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-ad562b0cdc42]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1968

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