Zimmermann Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1950	180001	1980	322671
1960	195001	1984	347000
1961	198001	1985	357000
1962	201001	1986	366000
1963	205001	1987	376000
1964	210001	1988	395400
1965	215001	1989	407550
1966	221001	1990	415600
1967	227001	1991	419400
1968	233001	1992	420413
1969	239001	1993	422103
1970	246001	1994	423972
1971	253001	1995	425660
1972	261001	1996	427101
1973	268001	1997	428386
1974	275801	1998	429454
1975	280501	1999	430600
1976	292501	2000	431753
1977	310001	2001	432819
1978	340001	2002	434053

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.