The era of the self-playing or automatic piano embraced the first three decades of the 20th century. Piano-playing cabinets were followed by the pneumatic player-piano, soon to be known the world over by the name of the leading American make - Pianola. There were many other makes, of course, with names like Kastonome, Triumph, Pistonola, Claviola, Autoplayer and Apollo. Invented almost simultaneously in Germany and America, player pianos became the...