Seiko Cal. 4550 - 580

The Seiko 4550-580 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-7640ed715075]

Also known as: Rally, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1966

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