Seiko Cal. 4581 - 313

The Seiko 4581-313 represents an important milestone in Seiko's 1974 lineup. Powered by the 4581 caliber with 27j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-d4a2e80b4325]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

27j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1974

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