Seiko Cal. 5621 - 583

This Spring Drive model from 1977 features a 45mm PVD Black case. It features a Black dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-c9bcb041af3b]

Also known as: Monster, Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1977

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