This set of 4 vintage copper mine post cards are in good condition. Two are black and white photos of the Arcadian copper mine in Michigan and one is from the Cliff mine near Phoenix. The fourth one is of a mine who's whereabouts I'm not sure. Great picture though.  Thought these are aged, they have great color. The edges may be a little worn or bent. Two of the post cards have been posted and written on. These are a great collectors item.