First All-Electronic Desktop Calculator Sumlotronic C VII - C 7 1960s This calculator represents a real piece of history. The Sumlotronic C/VII (also known as the Anita) is generally recognized as the first produced commercially available all-electronic calculator. That distinction alone makes the machine interesting, but the really fascinating part about this machine is that the designers managed to come up with a complete all-electronic four-function calculator made from tubes. Sumlock Comptometer Ltd., a company that made mechanical calculating machines, in collaboration with another London-based company, Bell Punch Company, built and marketed a machine that would herald the beginning of a new age...an age where the use of slide rules and mechanical calculators would fade into the mists of memory. From the introduction of the first Anita, and the subsequent proliferation of other electronic calculators, electronic calculating machines quietly and forever changed the way people dealt with the drudgery of mathematics. It appears that Sumlock realized that their creation was definitely a revolution in the way mathematics were dealt with, as the name Anita is an acronym for A New Inspiration To Arithmetic. More information here: https://en.wikipedia.org/wiki/Sumlock_ANITA_calculator Condition: Not calculating. Shows traces of ageing - please be inspired by pictures. Ensured shipping with T&T.