Image: Telefunken Rollkugel RKS 100-86 (bottom)

Description: The Telefunken Rollkugel was announced on October 2, 1968 – more than two months before Douglas Engelbart’s notorius demo of his mouse; it was routineley used by 1972, more than 9 years before the first mouse marketed in USA (with the Xerox Star)
Title: Telefunken Rollkugel RKS 100-86 (bottom)
Credit: Flickr: Unique mouse from Telefunken, pt. 1
Author: Marcin Wichary
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