Contrebasse à clavier

Contrebasse à clavier 3-stringed *double bass, with a detachable piano keyboard of 35-38 keys, invented by L. Duvivier of Nevers and patented by him on Nov. 10, 1892. Earlier patents had already been granted for applying keyboards to stringed instrs., however (176). Sachs, Curt. Reallexikon der Musikinstrumente. Berlin, 1913.