Is this subject still of interest? – if so, I have a Taurus guitar No52 of 1977 which I bought new in Bristol (UK) in ’78 in the original hard black case and used it for only a few months before having to give up due to presure of work, since when it has rested quietly in it’s case and has developed a beautiful tone. It is as new and was examined by a leading teacher in this area and described as in beautiful, virtually new, condition and fit for the concert platform. I am about to put it up for sale through Classical Guitar Magazine and, if unsuccessful, via top end auction house in Bristol or eBay uk. Photos available if anyone interested.