I'm not sure just what you have. There have been a dozen or more firearms manufacturers named "American" something and several other made models named "American" something. The only model I can find listed as "Action" is a cheap Spanish 6.35 automatic. If it is a 38 caliber, the 1850 must be a model number as there was no such thing as a .38 cartridge in that year. If you can repost with everything that is written on the gun and describe any symbols or other markings, I may be able to help you. Also, tell me what type of gun it is. I'm assuming a revolver, but a .38 could be an automatic pistol, derringer type pistol, or a rifle.
in the 1825 to 1850 American industry was
A shilling in 1850 was approximatley £3.82
There was no 1850 British Penny minted.
Henry Clay was involved in both the American system and the Compromise of 1850
American Express was created in 1850.
What is the value of a 1850 colt black powder with ships engraved serial number33700
How much is value if Charles Raymond v 1850 g wrist watch
Today the value would be in excess of $1850.
evolved into a distinctive and American culture
the Mexican American war
A few hundred to multiple thousands depending on EXACTLY what you have.