I imagine most folks went right over to Robert Eisenstadt's index to look this up Eric. http://www.antiquegamblingchips.com/molddesignindex_site.htm Robert says H.C.Edwards Co. supplied this chip mold to Nevada from the '40's to '68. Check his site for more info on this. Being that Harolds Club was run by a family, it appears to me that loyalty was highly valued by the Smiths. I'm guessing that is why they were with Edwards for so many years.