Dates for Series J
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A limited number of copies of the AMERICAN DIGEST OF BUSINESS MACHINES (1924) is available.  Use the link on the home page to find out how to get your copy.

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Dates for Series F Dates for Series 20-30 Dates for Series 100-300 Dates for Series J Dates for Portables Age by Serial Number Model / Serial Cross Reference

Manufacture Dates For Series J Ten Key Adding Machines

YearSerial Start
1954J1001
1955J12600
1956J42500
1957J60259
1958J81100
1959J102200
1960J132800
1961 +Unavailable
Courtesy of the Charles Babbage Institute, University of Minnesota, Minneapolis