Seiko Cal. 0728 - 775

The Seiko 0728-775 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-1d7289e8e9e6]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

28j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1974

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