William Parker Shotgun
 

I have a 12guage William Parker muzzle loader shotgun where would the serial number be located at, it is the type you load from end of barrel. Broke it down to two pieces has markings on the inside of barrel looks like British crowns. Thanks

it most likely is a British crown as part of a proof mark - your gun is not a Parker Brothers shotgun- they didn't make muzzleloders

there were several makers with the Parker name in the gunmakers district of Birmingham - if there is a serial number, it would be on the flats of the barrels. I would be amazed if any records exist

William Parker was a gunmaker from 1790 until 1840 and one of the forerunners of Parker, Field & Sons, High Holborn, London, 1841-1876