Seiko Cal. 5643 - 990

This Spring Drive model from 1967 features a 45mm PVD Black case. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e83a27aa8d4d]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1967

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