Seiko Cal. 7139 - 557

The Seiko 7139-557 represents an important milestone in Seiko's 1976 lineup. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-5b43b0a3a437]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1976

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