Heintzman & Co. Piano Serial Nos.

1900	15700
1905	24200
1910	35600
1915	48400
1920	61700
1925	74000
1930	83200
1935	84700
1940	86300
1945	88800
1950	93060
1955	95600
1960	98728
1965	134000
1970	145900
1975	154800
1980	165170

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.