Seiko Cal. 4550 - 166

The Seiko 4550-166 represents an important milestone in Seiko's 1978 lineup. With its 19mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-c035a08deadf]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1978

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