UK Piano Page Piano Forum
Please read the Piano Forum FAQ for more details. Also, read the piano FAQ for common questions on pianos Please don't ask us to place a value on your piano as an on site inspection is required. Contact you local piano tuner who will be more than happy to help.
The best hope of dating an old German piano is to get your tuner to remove the action (the working parts of the notes) and look for the action makers' name and number on the back of it. My Names page
mentions what seem to be bogus German names on genuinely German pianos sold in Scotland, and I wonder if this one from Machell is another example. Certainly, Wittig pianos were sold by Thomson, Glasgow but also Harston, Liverpool.