Can anyone share with me any information regarding various proof marks on the above weopon? I have one with the date of 1820 on top of the barrel and 1846 under the barrel. The lockplate has what appears to be Suhl in script but there is something else above that written also in script. on the backside of the lockplate is what looks like a 6 Y and the bottom of the Y looks like an arrow or maybe a 19 if turned upside down. This is found on all the parts of the trigger group. This is also found on the trigger guard just below a crown. This is also found on the rear barrel band with a crown. The middle barrel band had and L. and the front barrel band has a O under a crown. The brass plate opposite the lockplate has the same 6 Y or a 19 and a crown. The barrel also has proofs as: follows: FR, 1846 Lo T, 363 on left side of barrel. The steel buttplate is very rusty and nothing can be read on it.

Anything anyone can share would be helpful. Thanks!