Posted by Lawerence Oaks on April 28, 1997 at 18:40:04:
I FREQUENTLY RUN ACROSS PRINTS THAT LOOK VERY GOOD
BUT THAT I SUSPECT TO BE COPIES OR LATE PRINTINGS
BECAUSE THEY ARE SO CLEAN ETC. IS THERE A BOOK OR
INFORMATION AVAILABLE WHICH GIVES ADVISE ON DETECTING
COPIES OR FORGERIES?