Seiko Cal. 7139 - 423

The Seiko 7139-423 represents an important milestone in Seiko's 1974 lineup. Powered by the 7139 caliber with 31j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-75c6ba247bb4]

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1974

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