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PIANO SERIAL NUMBER DATABASE
Therson Piano Serial Number Lookup
Enter a Therson serial number to estimate the piano's production year. Available coverage: 1885–1940.
1885–1940year coverage
Not sure where the serial number is?
Serial-number locations vary by piano type and manufacturer. See the location guide for upright and grand pianos.
Therson production series
Choose the factory or serial-number series that matches your piano. Open a row to view selected serial-number examples.
Therson
Selected examples only. These rows are a small sample of the stored reference data. Enter the complete serial number above to check it against the full PianoLookup database.
| Serial range | Estimated year |
|---|---|
| 7,000 – 10,999 | 1900–1904 |
| 23,000 – 24,999 | 1925–1929 |