Many are simply not available, although our files include many dates of individual numbers which are not published anywhere else.
Some agree with other published numbers, some do not, which brings me to...
In 1958, 5 years before I became involved with pianos, N. Michel published the first "Piano Atlas" of serial numbers: This work was a tremendous achievement, listing thousands of American and other names, but it’s a bit like train-spotting, many entries say no more than can be found written on the piano anyway, and quite apart from the appalling spelling, conflicting entries, duplicated misspelt entries, and the absence of proper cross-reference, an increasing number of the items he published have proved to be wrong or misleading, and this discredits the others.
Removable wooden parts of the case are often imprinted with a number, but this may only be the last 3 digits of serial numbers, which are usually long numbers, at least 5 digits.
Remember that any handwritten information is probably not from the factory and could have been added at any time.
Don’t forget that you can use the usual CTRL F to find a name on this page.
Only a minority of piano makers have ever published dates of their serial numbers, and many of these are incorrect or misleading, so on this page, I have only included dates that I have some evidence for.
for British pianos are listed in date order near the bottom of this page.
A growing number of websites offer apparently simple dating of pianos by their serial numbers.
On the Piano History If you open the top of a piano and peer inside, you will often find one or more numbers in there.