Seiko Cal. 4550 - 420

Released in 1980, the Cal. 4550 with design code 420 was part of Seiko's domestic market collection. With its 19mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-949bcd626be2]

Also known as: Bullhead, World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1980

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