How much is a J Stevens 22 long rifle pat April 17 1794 with a N 437 under the lever action?

Answer 1

i have a stevens a&t 22 long rifle model 1794 and it has p-72 under the lever action not n 437 that is what it said on the internet what is the differents e-mail [e-mail]  thanks

Answer 2

That patent date is actually April 17, '94. Meaning 1894. Nothing like that was even in existence in 1794. It is a Stevens Favorite model 1894 and the Standard Catalog of firearms values them at:
Exc. $450
V.G. $300
Good $250
Fair $175
Poor $125
They were manufactured from 1893 to 1939.