The only substantial changes between the Wurlitzer U.S.-made organs and the European originals they copied is that the Wurlitzer models operated on Wurlitzer's unique roll scale. These included the 41-note style 125 roll (used by styles 103, 104, 105, 106, 125, and 126), the wider 46-note 150 roll (used by styles 145, 146, 147, 148, 150, and 153), or the still wider 75-note 165 roll (used by styles 157, 163, 164, 165, 166, and 175). Due to Wurlitzer's success and domination of the market, many smaller American manufacturers adopted scales similar to Wurlitzer's. Wurlitzer abandoned production of band organs and nickelodeons in 1939 but continued to manufacture the paper music rolls through a wholly owned subsidiary called the Endless Roll Music Company.