Wissner & Sons Piano Serial Nos.

1900	18000
1904	25200
1908	29200
1912	33000
1916	36000
1920	40000
1924	44000
1928	48000
1932	52000
1935	55000
1938	58000
1941	61000

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.