As an aside, given the barrel has been cut, you can spot it a mile away (if (IF) it's a .22).
The .22 top break Single Shots (the barrels) were mated to center fire actions----which, of course, does not compute. They made it work (with both center fire and rim fire---in the case of the 1st Models) by way of boring the .22 barrels on a bias---such that the center fire hammer/firing pin strikes the .22 rim fire cartridge on the rim-----and all's right with the world!
Given a cut .22 barrel, the bore (at the muzzle) is going to be off center with the barrel--which you can spot a mile away---or maybe a little bit closer---but you can spot it.
All things considered, that was pretty sneaky.
Ralph Tremaine