That type of action is usually on the Lefaucheaux system (may be not spelt right; my French is weak); the "lever where the forend would be" is characteristic of that early locking system. After the first decade or so of use, arms with this system were usually of lower quality. But not always. This system seems to have hung on in Scandinavia for a longer time than anywhere else.
If you can remove the barrel from the receiver, there should be proofmarks on the top of the receiver where it mates with the bottom of the barrel, and also on the flats of the bottom of the barrel where it mates with the receiver. If you could describe those in detail, or post a clear picture of them, we probably can tell you a lot more about this gun.
"Euscalunda" sounds like a Basque name or a company name in Euskadi, the Basque language. That makes sense because the Basque region was the main gunmaking center of the nation.
You need to measure the bore or try 16 and 20 guage shotgun shells in the chamber. If neither fits, it may be an 18 (rare) or 24 guage gun. The 18 was uncommon, but the 24 was fairly common in the early 20th century in Europe. If the 16 fits "sloppy" it may be a 14 guage, not common, but not unknown, either (the King of Spain had a pair. He liked them because his 12 and 16 guage shooting buddies couldn't borrow shells off him....royal but cheap!).
If there was such a firm that made pistols, it is likely that they may have made shotguns as a sideline, and this might be one. Long barrel suggests waterfowling gun.
If you can remove the barrel from the receiver, there should be proofmarks on the top of the receiver where it mates with the bottom of the barrel, and also on the flats of the bottom of the barrel where it mates with the receiver. If you could describe those in detail, or post a clear picture of them, we probably can tell you a lot more about this gun.
"Euscalunda" sounds like a Basque name or a company name in Euskadi, the Basque language. That makes sense because the Basque region was the main gunmaking center of the nation.
You need to measure the bore or try 16 and 20 guage shotgun shells in the chamber. If neither fits, it may be an 18 (rare) or 24 guage gun. The 18 was uncommon, but the 24 was fairly common in the early 20th century in Europe. If the 16 fits "sloppy" it may be a 14 guage, not common, but not unknown, either (the King of Spain had a pair. He liked them because his 12 and 16 guage shooting buddies couldn't borrow shells off him....royal but cheap!).
If there was such a firm that made pistols, it is likely that they may have made shotguns as a sideline, and this might be one. Long barrel suggests waterfowling gun.
