Gene,
Great information! Be sure to let us all know what company it is and who they produced the small key mold chips for. In other words what casinos? I'm sure they wouldn't mind making their records available if their still in business.

I realize the patent for various molds are sold among the manufactures, however often the mold is changed in a minor way, ie. closer to the HS or inlay perhaps you can dig out how the Reno Co. produced their version of the small key chips?

Gene, I find it strange B.C.Wills Co. would sell the small key mold to someone else while producing the large key throughout the 60' etc. Perhaps you can also find the answer to that question.

Best of luck in your quest! Jim