Seiko Cal. 7139 - 342

The Seiko 7139-342 represents an important milestone in Seiko's 1981 lineup. Powered by the 7139 caliber with 33j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-cc5bf8412b36]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1981

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