Seiko Cal. 0783 - 540

This Spring Drive model from 1980 features a 41mm Titanium case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-770a2b5f2aa3]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1980

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