Seiko Cal. 4427 - 583

The Seiko 4427-583 represents an important milestone in Seiko's 1968 lineup. Powered by the 4427 caliber with 21j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-268e8fc9c17d]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1968

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