Seiko Cal. 0731 - 725

The Seiko 0731-725 represents an important milestone in Seiko's 1978 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-89e2cf9c7a5b]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1978

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