Seiko Cal. 4583 - 721

The Seiko 4583-721 represents an important milestone in Seiko's 1984 lineup. Powered by the 4583 caliber with 27j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-514d31f4ad29]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1984

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