This compact Danish machine provided a low-cost alternative to the large and expensive full-keyboard rotary machines. Sigvard Bernadotte, a member of the royal family of Sweden, was responsible for the industrial design of this machine and the entire Contex line.

Unlike most machines in the collection, this machine is not fully automatic. It does not have a control register to keep track of the multiplier. Instead, the product is calculated for each digit of the multiplier individually as the digits are entered. The digits have to be entered in reverse order, since the machine has no way of knowing how many digits are yet to come.

It is also not a rotary calculator, since it employs an oscillating rack mechanism. This mechanism, more commonly found on adding machines, is slower than a rotary mechanism because half of the back-and-forth motion is wasted. Although it was designed to be an inexpensive machine, with only a sheetmetal chassis, the very modular construction shows obvious consideration made towards manufacturability and serviceability.