High speed multiplication and division, automatic decimal point placement, large capacity. Intended to incorporate all the advantages of rotary calculators (speed, large capacity) into a printing machine. After its introduction in 1964, there was a rapid succession of field service bulletins to correct various mechanical problems. Eventually, the machine colors were changed and it was reintroduced as the nearly identical 580 in 1967.

My sincere thanks to Dr. Robert Baron for the donation of this machine