Seiko Cal. 6639 - 365

The Seiko 6639-365 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-ff4dca92e2b1]

Also known as: UFO, Flighty

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1970

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