Seiko Cal. 0731 - 650

The Seiko 0731-650 represents an important milestone in Seiko's 1987 lineup. With its 18mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-412a8bbd7aa9]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1987

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