Seiko Cal. 4522 - 284

The Seiko 4522-284 represents an important milestone in Seiko's 1980 lineup. Powered by the 4522 caliber with 23j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-25132b112491]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1980

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