Biddle Piano Co. Serial Nos.

1900	18000
1903	30000
1906	44000
1909	58000
1912	68000
1915	74000
1918	80000
1921	85000
1924	89000
1925	90000

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.