Ritmuller Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1825	900	1920	27702
1830	1100	1924	29355
1835	1400	1935	29670
1840	1800	1938	29672
1845	2300	1939	29739
1850	3141	1941	29814
1875	3621	1949	29848
1890	6580	1950	29858
1895	9400	1951	29880
1900	12000	1952	29900
1905	15100	1956	30000
1909	20907	1957	30010
1910	22726	1961	30300
1915	26102

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.