Seiko Cal. 6639 - 792

This Automatic model from 1970 features a 39mm Hardlex-Coated Steel case. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-64e6da051db3]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1970

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