Terms of Use

Effective August 2026

piano.wiki is a free reference published by Grant Larcom. You are welcome to use it for any purpose, including commercially, subject to what follows.

What a date from this site is

The site tells you which production year a serial number falls into, according to the records we hold for that manufacturer. That is all it does. It is not an appraisal, an authentication, or proof of origin.We have not examined your instrument, and a serial number describes a number — not the piano it is stamped on, which may have been rebuilt, re-strung, re-badged, or fitted with parts from another instrument.

Before you rely on a date for a sale, a purchase, an insurance valuation or an appraisal, have the piano examined by a qualified technician.

Where the data comes from

The serial tables are compiled from published sources — including the Bluebook of Pianos and serial charts published by manufacturers themselves — together with our own verification, correction and cross-checking work. Manufacturer names and marks are the property of their respective owners.

Published serial tables are not perfect. They contain transcription errors, they disagree with one another, some firms kept poor records or lost them, and numbering was sometimes restarted or reused across factories and model lines. Where a source only permits a range rather than a single year, the site says so rather than guessing.

No warranty

The site and its data are provided “as is”, without warranties of any kind, express or implied, including any implied warranties of merchantability, fitness for a particular purpose, accuracy, or non-infringement. We do not warrant that any date is correct, that the site will be available, or that errors will be corrected.

Corrections

If you believe a date is wrong, there is a link on every result page to tell us, and evidence — a dated bill of sale, a factory decal, a technician’s record — is especially useful. Reports are reviewed by hand. Confirmed corrections are applied to the database and kept as test cases so the same error cannot come back. We are grateful for them, and the archive is meaningfully better because of the people who send them.

Affiliation

piano.wiki is not affiliated with, endorsed by, or sponsored by any piano manufacturer. Some articles link to Savvy Pianist and Setlists.io, which are also run by Grant Larcom.

See also the privacy page, which describes what the site records.