That is the spelling, I assume ? There is a piano called a Weinbach - I've had one for thirty-four years. If we're talking about the same thing they're lovely pianos, especially the grands - very warm tone. I think, somebody correct me if I am wrong, that they are, or at least were, actually made by Petrof.
Again, if you do mean Weinbach, then I can personally attest to the quality of mine. I have just had a completely new action put in last month and it has come up really well. I bought it new in 1971 and it stood very heavy regular playing for thirty-four years. I could have bought a new piano but chose to rebuild. The only general complaint about them is that their touch is very heavy. This does not worry me because I like a solid touch. Aside from this I haven't heard anything bad about them from anybody.
I have sent you a photo of it by email.