Seiko Cal. 4556 - 555

The Seiko 4556-555 represents an important milestone in Seiko's 1970 lineup. Powered by the 4556 caliber with 24j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-ee6fb3450edc]

Also known as: Bullhead, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1970

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