These must be from the same place, but what place were they from? Whatever the place was, it looks like they at least black jack there. So that rules out a lot of locations, like most card rooms. There is a mention in The Gaming Table, Revised Edition on page 37, 2nd column about 3/4 of the way down, "C in an O, Location Unknown, Mold: T's". Nice chips, where are they from?

"C in an O, Location Unknown, Mold: T's"