The set is 180 metal chips in a heavy oak poker chip box (grooves and all for the chips). There are three denominations (colored gold, silver and copper). The back of each chip has an image of an oil derrick. On the lid is a large bronze casting of a wellhead oil pump. The set was made by Oil Originals in 1961, a company started and directed by a multi-talented woman, LuCelia Wise (1913-2006), a native of Oklahoma of Indian descent, who was a teacher, artist, business woman and author and researcher. One of her books is Oklahoma's official bicentennial book. The set is quite unique. I'm sure many sets were made, but I don't know of any other sets around. Here are pictures of the set in no particular order: