I consider this a nice find. The label on this distinctive U. S. Playing Card Co. cardboard chip box says it all: "1-9/16 inch Knurled [serrated] Edge (Patented March 3, 1914), Paranoid Inlaid numeral, Figure 20, Black." The "Paranoid" line was USPC Co's. biggest and best chip. I never saw a USPC Co. chip box with a date on it. And I own only a few serrated edge chips. I'll start an eBay auction later today. Anyone who wants one of the chips, for $5 total, contact me.

Robert