Incidentally, printed in 1844, this is the first postage stamp from anywhere in the world that features a train.
You're gonna have to post a much better photograph to have any luck getting anyone to comment on its authenticity. On the plus side, the "X" pen cancel is typical of genuine copies. Most fakes and reprints are unused. That doesn't mean it is genuine of course, but it makes it worth further study.
See
https://www.pennypost.org/pdf/farre...llection.pdf for a picture of a genuine one and lots of examples of fakes and reprints and some clues to help identify them.
See also the Philatelic Foundation online database of stamps submitted for certification to see more examples of genuine copies and a few fakes and reprints.
http://pfsearch.org/pfsearch/ Good luck!