(Received 12 December 1972; accepted 19 January 1972)
Published Online: July
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On July 31, 1961 IBM introduced the Selectric or Model 72 typewriter. This machine constituted a radical departure from the conventional typewriter. It was designed as a high speed printer and was developed in part as a print out unit for IBM computers. The conventional type bars wers completely eliminated, and in their place a type element consisting of a removable type ball was substituted. The machine has proven to be a high quality typewriter giving excellent service and producing unusually uniform work. In September 1971 IBM introduced the Selectric II, an advanced model of their Selectric machine.
Examiner of Questioned Documents, New York, N.Y.
Stock #: JFS10449J