Seiko Cal. 4428 - 656

The Seiko 4428-656 represents an important milestone in Seiko's 1972 lineup. With its 21mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-2de11a829dac]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1972

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