Seiko Cal. 5639 - 941

The Seiko 5639-941 represents an important milestone in Seiko's 1975 lineup. Powered by the 5639 caliber with 26j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-2f4b383a3c05]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1975

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