Seiko Cal. 6639 - 732

This Kinetic model from 1981 features a 39mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 80m of water resistance. [seikata-wm-30c6c7c74642]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1981

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