Seiko Cal. 4521 - 184

The Seiko 4521-184 represents an important milestone in Seiko's 1999 lineup. With its 21mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-a4c3071477a7]

Also known as: UFO, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1999

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