Seiko Cal. 6639 - 112

This Spring Drive model from 1976 features a 36mm PVD Black case. Powered by the 6639 caliber with 33j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-be396da370ab]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1976

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