NATIONAL PIANO MFG. CO., Boston, Mass. 1911 makers of Conway, Briggs
    Merrill, Norris & Hyde, & Wentworth address 146 Boylston St. Factory at
    Neponset Mass., taken over by Hallet & Davis & Premier Baby Grand Co.
     Controlled after 1926 refer to Jacob Doll for uprights and Premier for
    Grands by Hallet & Davis up t0 1926.
1910-22000             1921-42000        1924-45000
1915-31800             1922-43000        1925-46000
1920-41000             1923-44000        1926-47000
NATIONAL PIANOS, Des Moines, Iowa
1904-36000             1906-40100        1908-42000
1905-39000             1907-41200
NATIONAL PLAYER PIANO CO., Oregon, Ill. - coin machines