Seiko Cal. 4521 - 673

The Seiko 4521-673 represents an important milestone in Seiko's 1981 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-39c4dcb76e9d]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1981

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