Seiko Cal. 6639 - 712

Released in 1967, the Cal. 6639 with design code 712 was part of Seiko's domestic market collection. Powered by the 6639 caliber with 27j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-b857190c7a57]

Also known as: Goldfeather, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1967

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