Seiko Cal. 0731 - 324

The Seiko 0731-324 represents an important milestone in Seiko's 1973 lineup. With its 18mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-529e497b8b5a]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1973

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