Ronisch Serial Nos.

 

Year	Serial No.
1900	30000
1905	39000
1910	50800
1915	63200
1920	67500
1925	73400
1930	76000
1935	76250
1940	76400
1945	76800
1950	77100
1955	78300
1957	79000
1961	86000
1966	100000
1976	150000
1980	175000
1985	185000
1990	200000
1995	207000

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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