Irmler Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1885	8000	1919	22600
1890	8500	1920	23000
1892	9200	1922	23800
1894	11600	1923	24200
1896	12200	1924	24600
1898	12900	1925	24900
1900	13250	1926	25100
1902	14000	1928	25700
1904	15430	1929	25900
1906	15800	1930	26000
1908	17000	1931	26100
1910	19000	1932	26200
1911	19300	1933	26300
1912	19600	1934	26360
1913	20850	1935	26370
1914	21000	1940	28000
1915	21400	1945	29100
1916	21800	1950	30200
1917	22000	1951	30900
1918	22400	1953	41000

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.