Wow, those are very nice sounding guitars.
I also have a Di Giorgio, although I had to rescue mine out of a skip destined for the land fill and fix it up quite a bit ?
its a 1972 "Student No 18" , but sadly someone put steel strings on it at some point (ouch) and snapped the neck. After a bit of repair it sounds ok, it's what I learned to play on. Oh, and the original tuning heads had to be replaced because they were slipping. Amazing what people throw away...