Yes they are but not a lot unless they are in excellent condition. Do you have any pictures? I am venturing to guess that the Leige is a Damascus which is a very nitch market in Canada but more collectable in Europe. Careful if you plan to sell or if you intend to fire these shotguns... some of them such as the Leige will blow up if you use modern ammo or powder.
It's not "modern ammo or powder" that will cause them to "blow up". I'm assuming you are referring to the barrels. It is firing any shell with greater pressure that the barrels can currently stand. Modern or old. And the problem would be the potential condition of the barrels and firing loads for which they were not designed, not that they may be Damascus or twist barrels.
They also are worth very little, even in excellent condition. And Damascus is not "more collectible" in Europe. Guns of this age are a niche market anywhere, Damascus barrel guns are a niche market anywhere. Guns like these in average to poor condition (most likely, not intended as a slight) are a dime a dozen in those niche markets. The H & R, for example, will require a fix of between $200 and $500 to have a skilled stocker repair whatever crack you are describing....greater than the value of the gun, ever.
Unless they have sentimental value or you have use for a shotgun that requires specialized low pressure loads, dump 'em for whatever you can get. The EE will help you decide what that number is.
BTW, Garaldtao, I have shot black powder proofed fluid steel and Damascus barrels shotguns that date to prior to 1900 with "modern ammo". I understand you are erring on the side of caution but please don't spread misinformation. If you care, learn about it. Same goes about niche markets in Europe.
There are actually a reasonable number of people here who are familiar with these guns and markets who can offer accurate information. And who likely will.
