Thanks. I think the Spanish Derby SxS was produced by Armas Erbi and F. Sarriugarte, as well as under the DIARM conglomerate. Some old threads say that the Derby was imported by American Arms and Tristar. I need to get my eyes on the actual gun, but I don't want to be a pest. This guy has a load of Superposeds, Model 12s and 42s, Win 101s, Rem 32s, and other stuff that I don't want to be tempted by. The one I might really tempted by is a Parker SBT C-Grade.