Rockwell 22K 

Date of introduction:  May 1976 Display technology:  Fluorescent
New price:   Display size:  8
Size:  5.4" x 2.9" x 0.55"
 138 x 74 x 14 mm3
Weight:  3.3 ounces, 94 grams Serial No:  111127.066
Batteries:  3*AAA  Date of manufacture:  year 1976
AC-Adapter:  111R Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

22K_BACK.jpg (349298 Byte)This Rockwell 22K was a milestone in the design of portable electronic calculators and influenced a lot of Far East calculators, e.g. the Concept Compact by Zayre Corporation. 

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Joerg Woerner, March 8, 2010. No reprints without written permission.