Duck, Son and Pinker Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1904	11000	1938	30800
1906	12000	1940	32000
1908	13300	1945	34600
1910	14500	1950	36200
1912	16000	1952	36923
1914	17000	1954	37273
1916	18000	1956	37572
1918	18800	1958	37880
1920	19600	1960	38134
1922	20600	1965	38909
1924	22000	1970	40211
1926	23300	1972	40880
1928	25000	1974	41629
1930	26000	1976	42386
1932	27400	1978	43649
1934	28000	1980	44612
1936	29500	1981	45800

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.