Seiko Cal. 5643 - 427

This Spring Drive model from 1975 features a 39mm Two-Tone case. It features a Black dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-207e520ffe1c]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1975

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