Seiko Cal. 6639 - 238

This Spring Drive model from 1975 features a 44mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-91d21a2aeddc]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1975

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