Mine would be(as of now) a newspaper article from feb 1969 about the stones rock n roll circus signed by mick,keith,bill,charlie and BRIAN JONES at one of his few visits at olympic studios for the let it bleed sessions,the author of the article had it signed at olympic studios , a few visits it took to finally catch brian aroound march/april....right before he left the stones.
This is one of the last items Brian Jones has signed with the stones in 1969
It was purchased from Tracks UK with letters of prov. it was expensive but well worth it.
Mine gem is Red Hot Chili Peppers' original 1985 vinyl edition of "Freaky Styley" signed by Kiedis, Flea, Martinez and SLOVAK (!!!) in 1986. The record belonged to Art Boerke - the veteran club promoter who died some years ago. I bought it couple of years ago and in this year I added the producer George Clinton and trumpet player Benny Cowan to it. Looks fantastic. Hope someday I'll add Maceo Parker and Fred Wesley's autographs - it will make the record super unique and one of a kind.