Seiko Cal. 4531 - 655

The Seiko 4531-655 represents an important milestone in Seiko's 1967 lineup. Powered by the 4531 caliber with 18j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-e990762d3e23]

Also known as: Sumo, Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1967

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