Knabe & Co Serial Nos.

1900	47000
1905	57000
1910	68000
1915	78000
1920	88000
1925	97400
1930	107300
1935	114100
1940	124000
1946	133500
1950	144620
1955	154300
1960	162750
1965	171287
1970	179259
1975	185468
1980	194164
1983	197894

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.