Seiko Cal. 4566 - 139

The Seiko 4566-139 represents an important milestone in Seiko's 1972 lineup. With its 20mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-303ab167ef7f]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1972

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