Seiko Cal. 6632 - 853

This Spring Drive model from 1976 features a 37mm PVD Black case. It features a Green dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-50a37b6cbb88]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1976

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