Seiko Cal. 6639 - 685

This Spring Drive model from 1981 features a 37mm PVD Black case. It features a Navy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-8ed134d6e46e]

Also known as: Pogue

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1981

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