I picked up a few older Nevada casino dice. I have looked through a couple real good dice collector sites, but most of these I don't see. Does anyone know about when these dice were used? Most of these are single dice Only the Harvey's is a pair, and they are drilled. Any idea on historic value? The person I got them from said her grandmother gave them to here over twenty years ago. She didn't know how long she had had them before that. Any help is appreciated. There is another picture on the extra link.