Petrof Piano Serial nos.

Year	Serial No.	Year	Serial No.
1900	13000	1964	96000
1905	16200	1966	105300
1910	24000	1968	117800
1915	30500	1970	146900
1920	33400	1972	173400
1925	38100	1974	208900
1930	46500	1976	233700
1935	52200	1978	280300
1940	58000	1980	330000
1945	62700	1981	340000
1949	66250	1983	387000
1950	67280	1985	423700
1952	69680	1990	504500
1954	73000	1995	529900
1956	77500	1997	547790
1958	82600	1999	560880
1960	87200	2001	577290
1962	90600	2003	593140

These serial numbers can be used only as a reference point.
An Exact date does not make a material difference to an assessment of a piano - a year or so out 120 years ago really is neither here more there.

The idea that 100% accuracy for all piano makers over a century ago is an interesting thought - but considering that all record keeping would be hand-written and kept in large ledger books, inaccuracies are likely. These records will be as reliable as the clerks whose job it was to keep them. The digital age of barcodes and scanned labels was still in the realm of science fiction. So we have to be content with our best guess numbers.

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Petrof: Short History

Rogers Piano Serial Nos.

Year	Serial No.	Year	Serial No.
1892	15601	1949	44600
1897	18000	1950	45100
1904	20400	1964	46451
1906	21500	1966	46920
1908	22800	1968	47340
1910	24100	1970	48130
1912	25900	1972	49140
1914	26500	1974	50100
1916	27500	1976	50850
1918	28500	1978	51520
1920	30000	1980	52720
1922	32000	1982	93451
1924	34000	1984	99000
1926	36400	1986	100230
1928	38800	1988	100457
1930	40500	1990	R159000
1932	42000	1991	R160000
1934	42800	1993	R160800
1936	43500	1995	R161600
1938	44000	1997	R162250

These serial numbers can be used only as a reference point.
An Exact date does not make a material difference to an assessment of a piano - a year or so out 120 years ago really is neither here more there.

The idea that 100% accuracy for all piano makers over a century ago is an interesting thought - but considering that all record keeping would be hand-written and kept in large ledger books, inaccuracies are likely. These records will be as reliable as the clerks whose job it was to keep them. The digital age of barcodes and scanned labels was still in the realm of science fiction. So we have to be content with our best guess numbers.

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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

These serial numbers can be used only as a reference point
An Exact date does not make a material difference to an assessment of a piano - a year or so out 120 years ago really is neither here more there.

The idea that 100% accuracy for all piano makers over a century ago is an interesting thought - but considering that all record keeping would be hand-written and kept in large ledger books, inaccuracies are likely. These records will be as reliable as the clerks whose job it was to keep them. The digital age of barcodes and scanned labels was still in the realm of science fiction. So we have to be content with our best guess numbers.

Back to the Piano Atlas