Seiko Cal. 4521 - 631

The Seiko 4521-631 represents an important milestone in Seiko's 1992 lineup. With its 21mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-451fffb0af70]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1992

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