Seiko Cal. 6639 - 913

The Seiko 6639-913 represents an important milestone in Seiko's 1971 lineup. Powered by the 6639 caliber with 21j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-055c7504b9a8]

Also known as: Pogue, Panda

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1971

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