Seiko Cal. 6639 - 792

The 6639-792 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6639 caliber with 26j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-3db077b75ffe]

Also known as: Panda, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Cream

Jewels

26j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1999

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