Seiko Cal. 6623 - 428

The Seiko 6623-428 represents an important milestone in Seiko's 1977 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-18201a3fff20]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1977

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