Seiko Cal. 6639 - 507

This Spring Drive model from 1972 features a 37mm Two-Tone case. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-18815381e34e]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1972

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