Hi,  Horace Waters Piano 80013: Manufactured in early 1917.
1917 started with 80000 and 1918 started with 81000.

Waters, Horace, 447 Broadway, New York, 1950 to 481 Broadway 1864; sons
were T. Leeds and Horace Jr.; factory at 7 West 139th St.  Est. 1845,
affiliated with Jansen 237 East 23rd St., New York.  Made Chester,
Waters and Autola Players, discontinued 1949, organs 1859-1879.

Information from Pierce Piano Atlas 10th Edition

Jack M. Conway, Los Angeles, California, USA