Hofberg, M. Piano Serial Nos.

1900	6900
1905	10300
1910	14300
1915	18100
1920	22200
1925	25800
1930	28500
1936	29100
1940	29400
1949	29500
1955	53600
1960	55900

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.