Seiko Cal. 4531 - 660

The Seiko 4531-660 represents an important milestone in Seiko's 1993 lineup. Powered by the 4531 caliber with 25j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-dc2c3ea92ffa]

Also known as: Sumo, Rally

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1993

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