Zellman-Socal Piano Manufacturing Co. Serial Nos.

1906	13700
1908	25000
1910	37700
1912	46000
1914	56000
1916	64000
1918	72110
1919	76000

It is remarkable that data on piano serial numbers has survived so well for over a century. However, some inaccuracies are inevitable. These serial numbers are to be used only as a rough guide to a piano's age. An exact date does not make a material difference to a piano assessment. To be within 2 to 5 years is accurate enough to give an informed report on a piano.