Seiko Cal. 4551 - 566

The Seiko 4551-566 represents an important milestone in Seiko's 1968 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-2df225b493bf]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1968

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