Seiko Cal. 5691 - 728

This Automatic model from 1979 features a 43mm Titanium case. Powered by the 5691 caliber with 31j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-da1e98c29d84]

Also known as: Turtle

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1979

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