Seiko Cal. 0731 - 399

The Seiko 0731-399 represents an important milestone in Seiko's 1981 lineup. With its 22mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-ff0732609d4c]

Also known as: Rally, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1981

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