Upper section encasing the mechanisms is black- lower section with keyboard is greyish tan. Has a plate on front which reads General Business Machines Corporation.
Olivetti engineer Natale Capellaro and industrial designer Marcello Nizzoli created a number of the company's calculators. The Divisumma models offered automatic calculation with all four basic operations; the Divisumma 14 was an early example of a printing calculator with automatic division. The later Divisumma 24 was a great commercial success for Olivetti.