Schaeffer Piano MFG. Co. Serial Nos.

1900	17000
1903	23000
1906	28000
1909	33000
1912	45000
1915	50500
1918	56500
1921	62400
1924	69000
1925	71000

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.