So we end up with a very precise CATALOG, but with no guaranty of the proper use. You have no idea how the distribution of the varieties are, when they are not correctly entered by our members. A type collector will just put his coin, be it for his collection or for swap, in any year line! I've had multiple swaps, where the variety (second, third or whatever year line) is not respected. I actually collect by year and variety! The problem is more for the swaps and statistics. I think the catalog is more accurate, if it includes all varieties as year lines.
