Bradbury, William B. Piano Serial Nos.

1900	29400
1904	31700
1908	34000
1912	36100
1916	37300
1919	38000
1930	98000
1933	110000
1936	135000
1939	170000
1942	204000
1943	210000
1947	243000
1949	254000

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.