you should note that Iver Johnson immigrated to Worchester, Massachusetts from Norway in 1863. He and his partner Martin Bye were awarded firearm patents in 1876. I don't see how you could have a 1862 model of a Iver Johnson pistol ???
The only way to give an accurate value is to know exactly which brand and model it is, and how old it is.
what is the value of a jukar black powder pistol 007806
Modern reproduction. Value may be $75-$150, depending on model and condition.
What is the value of a 1850 colt black powder with ships engraved serial number33700
what
that would be a percussion black powder rifle from the civil war. value would depend on overall condition
50-200 usd
678.00
Dikar Spain-45 Cal black powder only
There are many variables here, the value would depend on the date of manufacture, the model, the originality and rarity of the gun and the over all condition. With more specific information a value could be forthcoming.
10-100usd
25 HUNDRED