Seiko Cal. 4556 - 745

The Seiko 4556-745 represents an important milestone in Seiko's 1976 lineup. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-caa9fce550aa]

Also known as: World Timer, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1976

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