Seiko Cal. 0720 - 740

This Spring Drive model from 1989 features a 40mm Titanium case. With its 22mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-48cfcf16f3d8]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1989

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