Seiko Cal. 6639 - 424

This Kinetic model from 1967 features a 39mm Hardlex-Coated Steel case. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-1701fa9ce41b]

Also known as: Helmet, Rally

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1967

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