Seiko Cal. 0731 - 139

The Seiko 0731-139 represents an important milestone in Seiko's 1985 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-c93efaa9d3fc]

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1985

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