Cramer J.B. Piano Serial Nos.

Year	Serial No.
1880	15000
1885	17500
1890	20001
1895	25000
1900	30675
1910	45410
1920	57200
1930	64200
1933	75060
1940	128750
1945	129600
1950	129220
1953	129500
1954	129600
1955	179780
1956	129975
1957	130025
1958	130200
1959	130375
1960	130520

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.