Dammit, man- we need PIXELS! In order to make out the markings, we have to blow up the pics. Unless they have enuff definition, blowing them up only gives us a large fuzzy picture.
The first gun appears to be Belgian, from around 1871-1872 period. Think I can see this mark-
which is the Leige Belgium proofhouse.
The other gun MAY be English- looks like the crossed halbeards proofmark. Cannot read the writing on the side- if that says W Richards- that is NOT Westley Richards (well known British maker of very high quality guns) There were 5 other companies that used W Richards- one of them English, from about 1880.
And yes, those are Damascus type twist steel barrels, and I would urge you to fire NOTHING through them. Originally meant for low pressure black powder shells, after a century and a quarter with corrosive black powder residue to work on each of the thousands of weld points.......
Now go get us some hi def photos of the markings.