Seiko Cal. 5689 - 755

The Seiko 5689-755 represents an important milestone in Seiko's 1977 lineup. Powered by the 5689 caliber with 28j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-6cfa3d13fc22]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1977

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