Kohler & Campbell Piano Serial Nos.

1900	1000
1905	46000
1910	116000
1915	165000
1920	206000
1925	237000
1930	266000
1935	274000
1940	288000
1947	401000
1950	408000
1955	503000
1960	535000
1965	579000
1970	631500
1975	695000
1980	754000
1983	795491

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.