I seriously doubt if many people are making the effort to copyright pictures of their Damascus barrels. Most of these photos of Damascus tubes with names interwoven into the pattern have been posted in multiple places on the internet for years without problems. People are selling and trading copies of a Double Gun Journal that contains photos of a D.M. Lefever crossbolt gun I own, and there is probably nothing I could do about it. I'd have to be a dick to even have the thought cross my mind anyway.
In the case of Rock Island Auction granting permission to use images they had of a gun they auctioned in the past, that usage with attribution will amount to free advertising for their business. But it was nice of them to supply the image files and grant permission to use them.
