Seiko Cal. 6639 - 660

This Spring Drive model from 1991 features a 41mm PVD Black case. It features a Cream dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-f96e6b1378c6]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1991

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