Jagger autograph found

I worked at a record store in Hollywood in 1971. It attracted every musician, famous or newly discovered. Anyways the record, 2 disc set, Hot Rocks by the Rolling
stones came out. One day Mick Jagger and his buddies came in to check on sales and buy many other LPs... and I got him to autograph the jacket!!! Going thru my LPs recently, I came across this gem, which I had forgotten about!