Gardner, A. B. Piano Serial Nos.

1901	24000
1902	26000
1904	30000
1906	35000
1908	40000
1910	45000
1912	52000
1914	60000
1916	62500
1918	71000
1920	78000

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.

Chase, A. B. Piano Serial Nos.

1900	42000
1904	47000
1908	52600
1912	55600
1916	58800
1920	62000
1924	66000
1928	70000
1932	190000
1936	106500
1938	111500

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.