Schaaf, Adam, Piano Serial Nos.

1900	10000
1903	14500
1906	19000
1909	24100
1912	28300
1915	35800
1918	47000
1921	56000
1924	65000
1926	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.