"The cage manager claimed last night that the Cal Neva Resort 70th anniversary chips were the first Chipcos ever to have a stacking edge design. I never knew that!"

Only if they made the 70th annivrsary chips a couple years early! The Bull Durham (Black Hawk) stackable edge set was made in 1994, and there were sets of Chipcos from the Gregory Street (Black Hawk) with stackable edges made in 1995 and 1996.

Bob