Thank you for the responses. I did ask and I appreciate your opinions. I hadn't thought too much about the origins of the piano to that point and it was only when I clocked the name on the case that I questioned it.
But look, this seems to me a bit more complex. My first thought was that they must have built their own case but then that would mean that they would have had to install a new soundboard. My instinct is that they did nothing of the kind (the marks are all correct for the era I think and why bother? ) and that what I am looking at is a modification and re-veneer of a bona-fide 1912 Steinway. The frame will date to 1912 - but when did Maple & Co re-work it? My money is on a customer who bought furniture and wanted their piano to match. So who would be the vandal here if that were the situation?
Are we not simply about to do to the piano exactly what Maple & Co may have done? Or rather, partially undo what they did. If anyone knows any history of what furniture makers of the era did in respect of pianos I would be very glad to know. I don't want to vandalise something of value, but equally I don't want to steward something that doesn't really have any artistic merit and I have a serious lack of information here.
To address your question, WhoDwaldi the finish is a little bit chipped at the corners here and there but would quite probably come back quite nicely with careful repair (which the re-builders are certainly capable of). One of the things that I like about the piano is that it gives every indication of having been well cared for (it also has an exceptionally clear and tonal treble - well it did until the strings came off). However, up close satinwood is quite an undramatic and subtle finish. There is little contrast to the inlay. The music desk is a bit warped and would need to be replaced anyway.
We have other ideas about the piano's future that a black finish will enhance. I would expect it to come out looking a bit more like this one:Steinway Model O restored