Please, help me to ascertain if this autogragh of Freddie Mercury authentic or not? I've purchased the autograph with the COA several months ago from Ireland. The seller, an experienced collector, UACC member, says the photo was signed in February of 1988 in Garden Lodge, Kensington, London. The item is a coloured gloss photograph sized 12"h x 8"w signed with a green sharpie. I found out that pro…