I've always loved these...they completely don't fit in any of the collections I have but I just think they are neat and have never been able to part with them. From left to right: Arkansas Valley/Smelting Co./Leadville.Incorporated 1882/The/Arkansas Valley Smelting Co./Leadville ColIncorporated 1879/The/A.R. Meyer And Co/Ore Milling And Sampling Co./Leadville Col Just thought I would share. I think some of these are pretty hard to find