Seiko Cal. 6139 - 790

The Seiko 6139-790 represents an important milestone in Seiko's 1974 lineup. Powered by the 6139 caliber with 26j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-8c7be825f29e]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

26j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1974

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