I mean it's probably Waldbach rather than Waldebach isn't it? Have a check.
If so (and without digging too deeply at this stage) it's probably a bog standard Chinese baby grand piano.
How much did she pay for it?
How long has she had it?
Did she buy it brand new?
Does she want to sell it to you or are you just helping her put a value on it?
Please give us more info and we'll be happy to help