Bluthner Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1920	100000	1970	140000
1930	115000	1972	141000
1940	125500	1974	142000
1942	126000	1976	143000
1943	127000	1978	144000
1946	128000	1980	144900
1948	128200	1982	145600
1950	128800	1984	146400
1952	129400	1986	147200
1954	130100	1988	147800
1956	131000	1990	148200
1958	132000	1992	148600
1960	133006	1994	149000
1962	136000	1996	149400
1964	137000	1998	149800
1966	138000	2000	150200
1968	139000	2002	150600

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.