Seiko Cal. 4551 - 642

The Seiko 4551-642 represents an important milestone in Seiko's 1982 lineup. Powered by the 4551 caliber with 31j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-c7dd5bc1072b]

Also known as: Monster, Bullhead

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1982

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