Seiko Cal. 4584 - 855

This Hand-Winding model from 1981 features a 41mm Hardlex-Coated Steel case. Powered by the 4584 caliber with 20j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-d255052fef9b]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1981

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