That piano is either a style 7 or style 8. What differentiates the two models is the style 8 has the aliquot stringing, which is a 4th unstruck string that resonates in sympathy with the struck strings. It adds a bit of colour to the sound. The style 7 which doesn't have it, is still a sought-after instrument and can be fully rebuilt to an exceptional standard. The piano probably still has a fine sound, although a rebuild would bring out the exceptional qualities in the piano. It is really important that you don't dump this piano, but find a buyer who wants a project or who wants to enjoy it as it is. I am totally in love with the early 20th Century Bluthners, they were far superior to the models that came later (the style 12 replaced the 7 and 8), and the new model 6, despite having the more modern lattice style plate design, seems to owe more to the style 8 than the models in between.
These pianos have a beautiful sustained singing tone and are amongst the finest instruments ever made, despite the fact that they have a low market value in original condition.
![[Linked Image]](http://s1284.photobucket.com/user/ioof13/media/blutner_zps369379bf.jpeg.html)