Winter & Co. Piano Serial Nos.

1900	4000
1905	12000
1910	28000
1915	50000
1920	67000
1925	81000
1930	98000
1935	125000
1940	183000
1943	210000
1946	225000
1950	265000
1955	324500
1960	364200
1965	392000
1970	410900
1975	433400
1980	446900
1982	452400

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.