Klein Piano Serial Nos.

1900	16269
1905	23119
1910	29279
1915	32679
1920	35939
1925	38639
1930	41099
1935	42559
1939	43599
1945	44099
1950	46400
1955	48620
1960	51250
1966	54001
1970	56601
1980	70901
1983	73001

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.