Seiko Cal. 6389 - 743

This Spring Drive model from 1977 features a 43mm Titanium case. With its 20mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-06c557b2630d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1977

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