Commonly faked paper; however there has yet to have been one with the proper measurements of the original.
So that said; how many pages do you have, meaning is it folded. If it is folded what are the measurements, if not folded what are the measurements? What articles are on the back side.
I ask this because I own a perfect one my self and have sold two others that where not so perfect. I know the measurements and what is written throughout the full edition.
If your measurements are true then I have a pretty good list of people all around that can certify if it is real I would be happy to put you in contact with. I also know of a few places who would purchase it as well. Then of course it could be donated after certified to a US Federal facility for the tax write off of the value, this I have done too.
Be cool if it is the entire edition; I only know of about 29 of them, one I own my self. If it is the full edition then I know a man in Dubai who has a standing Top Offer on anyone who is willing to sell theirs.
If you measure it, do it first in the frame. Open the frame if you think it folded to gain those measurements. Snap shots of the back and other pages that may be there.
If you like you could PM me and I would send you my email address so this does not have to be so public.