The Tonette portable mono tape recorder was manufactured in Warsaw from 1963 to the early 1970s. The tape recorder had an innovative design that broke the ties with the aesthetics of industrial design of the 1950s. The tape recorder’s electrical system uses electron ray vacuum tubes and diodes on printed circuit boards. The mains-powered device uses alternating current. A single-phase induction electrical motor, the SAZ-1,7, is used to drive the tape mechanism. The recording mechanism comprises two half-track heads – one erase head and one recording/playback head – with two tape speeds (4.75 and 9.50 cm/s). The innovation in the tape recorder’s design was the use of a frame made of a light pressure casting of an aluminium alloy, to which all mechanical and electronic components, as well as the modular housing, were mounted. Manufacturer: Zakłady Radiowe im. Marcina Kasprzaka, 1964 Inv. No.: MIM210/V-25 Model prepared on the basis of photogrammetric measurements Licence: CC BY-NC-SA