That style of breech is known as the Warrented Style, also nicknamed the Trapdoor for is vague similarity to the Springfield.
The other common style is a Rolling Block style.
Most you run into are Belgian mfg though the origins are French design.
I've seen German and Austrian marked ones too.
Usually made in Parlor or Saloon gun styles for indoor shooting,,Shooting for Drinks was common!
22CB cap and other low pressure cals are the norm. 32RF smoothbore and rifled is common too. Check the face of the breech and you can quickly see if the firing pin is set up for a RF or CF cartridge.
I think I can see Belgian proofs on yours.
Most are very plain guns though some get very ornate w/ DSTriggers, very high grade Euro Walnut stocks, carving & checkering, fancy sights, engraving, ect.
A friend just sold a German proofed/ mfg double SxS Flobert with the Warrented action. Right bbl was 9mmRF shot, left .22rf. The Left bbl trigger was a single set trigger to boot.
These still don't get much attention though it does seem to be changing. That SxS sold quickly, and the more fancy ones will gain respect and $$.
The pistols generally have the more compact rollingblock type action on them and they sell better and for more $$ than the rifles. Many of the pistols are more ornate than the rifles too.
The plain, well used long guns still seem to languish at shows and shops in the $100 +/- range from what I've seen.
Your is in much better condition than most I see,,most look like they just came in from the barn after 80yrs of holding the door closed.
They draw attention and questions from people at shows when they are out on a table but usually little interest to buy.
