Seiko Cal. 6639 - 906

This Spring Drive model from 1968 features a 37mm PVD Black case. It features a Silver dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-61ecad0d4a01]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1968

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