Seiko Cal. 4428 - 561

The Seiko 4428-561 represents an important milestone in Seiko's 1983 lineup. With its 21mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-c941582be640]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1983

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