Seiko Cal. 4428 - 963

The Seiko 4428-963 represents an important milestone in Seiko's 1982 lineup. Powered by the 4428 caliber with 19j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-22dc454a4506]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1982

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