Seiko Cal. 6639 - 131

This Kinetic model from 1975 features a 40mm PVD Black case. Powered by the 6639 caliber with 24j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-f3720f2f8f67]

Also known as: Rally, Silverwave

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1975

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