Seiko Cal. 4421 - 630

The Seiko 4421-630 represents an important milestone in Seiko's 1982 lineup. Powered by the 4421 caliber with 17j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-b8d160bebb05]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1982

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