Baus Piano Co. Serial Nos.

1900	20000
1903	33000
1906	75500
1909	92000
1912	104000
1915	116000
1918	125000
1921	132000
1924	143000
1927	168000
1930	178000
1933	182000

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.