Seiko Cal. 5647 - 539

This Spring Drive model from 1975 features a 37mm PVD Black case. It features a Burgundy dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-1bbd71a78932]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1975

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