Addo-X 8341-82

Duplex booking machine

ca. 1965

This Swedish full text booking machine has a balancing result unit and a memory unit calculating to zero. It was manufactured by the Addo company in Malmö. The keyboard is a ten-key block keyboard with motorized function keys (addition, subtraction, subtotal, grand total, etc.), place indicator, setting unit clearing, motorized carriage shift keys as well as positive and negative repetition. Other automatic functions such as date printing, all arithmetic operations, non-addition, print repetition, non-write, etc., are featured by this model. The control bridge can be provided with four programs. The writing unit is an IBM Model 72 spherical head machine with small/large changeover, backspace, tabulation, separate on/off switch. The writing position is independent of the calculating section. The machine was built from about 1963 to about 1972.