TitleVon Reppert Calculator - Typewriter attachment
Dimensionsoverall: 6 1/2 in x 4 1/2 in
DescriptionB&W image of a Von Reppert invention that attaches to an Underwood typewriter. Shows the typewriter on a base with the calculator keys underneath
the typewriter keys. The results are presented on a component that rises up behind the typewriter carriage.
Verso: Prototype Calculating Machine Patent # 1,302,250 Rachard v. Reppert
|102698427||Von Reppert Calculator - Typewriter attachment|