Seiko Cal. 6639 - 734

This Solar model from 1989 features a 40mm PVD Black case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-770fa3085c32]

Also known as: Bullhead, Goldfeather

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1989

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