Seiko Cal. 6639 - 239

The Seiko 6639-239 represents an important milestone in Seiko's 1971 lineup. Powered by the 6639 caliber with 32j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-933cc326e1c8]

Also known as: Turtle, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1971

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