I don't know, Steinway restorers used to arrive from Poland who were "sparkling," but then they were a disaster in every respect.
What do I do with a century-old piano that shines like new but has lost its identity? And not only that...
Look for an artisan so that you can follow the restoration step by step and even do something yourself if you are allowed.
Did Bechstein frames break? Not at all. It was most likely the Blüthners, but those built in the post-war period because they remained confined in East Germany (GDR). Bechstein had some continuity problems during the post-war years because the factory had been closed and converted. After that, upon reopening, the skilled workers had disappeared.
I have a 1930s Bechstein restored by myself, for which I even ordered olive green hammer felt from Germany, and I challenge anyone to look at it and say seriously that it is a piano restored with modesty, differing only by a few numbers (serial numbers) from the early post-war models. The designs were always the same until the 80s; they only changed the design recently, following the Steinway model.
I believe my C. Bechstein is the best specimen among all the instruments I have worked on... and even those who play them remain quite perplexed! Commercial value? Little to none!