Seiko Cal. 4550 - 681

This Quartz model from 1974 features a 37mm PVD Black case. It features a Black dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-83d9232cf9e0]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1974

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