Seiko Cal. 5639 - 671

The Seiko 5639-671 represents an important milestone in Seiko's 1990 lineup. Powered by the 5639 caliber with 34j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-708f80509068]

Also known as: Pogue, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1990

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