Seiko Cal. 4537 - 661

This Spring Drive model from 1977 features a 37mm PVD Black case. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-18321658b449]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1977

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