Added better image of stamp
I'm hoping someone can help me with a stamped envelope I came across today while going through a box of covers. As the subject says, it's a stamped envelope (Scott U1, UPSS #2) that includes a version of Bouton's 1848 2c Black (18L1). I'm wondering if it's a counterfeit but I know so little about this stamp and local postage in general I can't say for sure.
This one seems considerably less "detailed" than even the counterfeits I read about online. Other concerns I have is the black "PAID" cancellation, everything else I have seen is red. And the fact it is appearing on a stamped envelope from 1853 or later.
Is there a source to go to where you can compare this specimen to an original?