Seiko Cal. 7139 - 342

Seiko 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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