Seiko Cal. 6639 - 648

This Spring Drive model from 1973 features a 42mm Gold-Plated case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-607006ac8ee4]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1973

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