The first musical machines appeared in the collection in 1929. Systematic acquisitions were made in the 60s when the collection received its rounded-off character. Currently, 119 musical machines are deposited in the National Technical Museum. The collection is systematically divided according to the principle into glockenspiels, pipe machines, comb machines with barrel and disk, reed machines and combined musical machines (orchestrions). The collected musical machines were created in the period from the mid-18th century to the World War II and were manufactured mainly in Czech, German and Swiss workshops that dominated this field. The greatest part of the collection comprises comb machines, barrel-organs and reed automatic machines. Rarities of the collection are represented by the machines with movable figurines: barrel-organ with a boy figurine (Polyphon 1894), barrel-organ with an ape band (Netherlands, 1840), a Negro playing flute (Halle, 1900), automatic machine with puppets Amorette (Leipzig, 1890), cylindrical music box with Chinese, automatic machine with bees (Switzerland, 1880). Pieces made in Czech workshops are represented by comb musical machines and production equipment from the workshop of Frantisek and Gustav Rebiceks from the last century. The collection of barrel-organs from Prague (Hrubes, Kamenik, Rubes) and country workshops (Gall - Hostinne, Reimer - Chrastava, Kolb - Pekarov) is quite numerous.