The crown & scepter suggests British origin as does the name Patrick. If it is really percussion (muzzle loading) and not a breech loader with side hammers, it would date from after the invention of the percussion ignition system about 1832 to the general acceptance of the "modern" self-contained cartridges in the 1860's. The silver escutchion was for the original owner to have his name or initials engraved and is usually one sign of a "better" gun. Does it also have extensive engraving on the receiver and/or fine checkering on the wood? I have no information in my files for a maker named Patrick and my on-line source for data on UK manufacturers (internetgunclub.com) appears to be down.
if there are no barrel markings......how do you know it's a colt ??
Does not exist.
Not with just those markings. Provide a detailed description of all markings and maybe.
Provide a detailed description of all markings on the bbl. It might be possible.
Provide a DETAILED DESCRIPTION OF ALL MARKINGS, barrel length, finish
Have you tired the internet?
The markings on the receiver and barrel will tell.
Not enough information to answer. Are you seeking the value of a barrel or of a complete shotgun? Please repost with more info, and any and all markings on the gun.
Yes. You will need to provide a detailed description of all the markings.
The fixed choke markings are denoted by * marks on the bottom of the barrel under the forearm assembly. 3 on the left barrel and 4 on the right. *** Modified choke **** Improved Cylinder
$150 - $400 depending on condition and year made (barrel markings determine the period when the barrel was made)
Library.