Let's see if I can help with some assorted images that come from HG1's Photobucket album. I am assuming that all the pictures are from the same gun. Perhaps others more knowledgeable will contribute their observations & thoughts.
Hopefully HG1 can clarify and expand on my SWAG assumptions & post some pics of the barrel flats along with any other marks on the gun that are missing from the current images. If you click on HG1's original image it will open his Safe non-threatening photobucket album with these as well as more images of the gun.
First up is an image of the whole gun. It is an old sidelock hammer gun with Damascus barrels. The Trigger guard with barrel opening release sitting down into the front concave section at the front of the trigger guard.
There is 100% coverage of well executed fine rose & scroll engraving on the action, trigger guard & hammers. Engraved on Doll's head extension what looks to be a rising Sun above a inlaid gold line.
Engraved script on the rib "W B L Lancaster Pa", ground central of Eastern Pa Deutsche(German)immigrants. The fuzzy image of the unknown Stamp is between the barrel lumps. No other stamps are visible on either the barrel or action flats as shown in the current set of pictures.
There is a picture of the interior of one of the locks that has " Patents Manton & Co" and some patent numbers stamped that can be seen behind the leaf spring.
I will hazard a SWAG that this gun was built/finished in Lancaster Pa by a Pa Dutch (Deutsche) craftsman.
