Seiko Cal. 0771 - 639

The Seiko 0771-639 represents an important milestone in Seiko's 1967 lineup. Powered by the 0771 caliber with 17j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-07d5ecce6f78]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1967

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