Seiko Cal. 0731 - 155

The Seiko 0731-155 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-779330a2e78c]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1969

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