A rare German Black Forest musical organ wall clock with bird automaton, circa 1820

41-cm painted dial with concave centre, Roman numerals and diamond hands, polychrome painted flowers with musical trophy, recessed platform with break arch canopy and similar polychrome painted flowers, two painted wood birds that snap their beaks and twist to the music of the barrel organ musical mechanism playing 8 airs on 21 wood pipes every hour or at will, 8-day wood posted movement with anchor escapement and countwheel striking on a bell, wooden case made for wall suspension with tune sheet (illegible), signature (illegible) and Furtwangen.