I visited Slim Ewing about a year before he died. He was not very alert so can not swear to what he told me. I am not even sure this will help you.

He said he sold his 1st chips in the late 30's. He did not say they were the Ewing mold. Per his live in companion ( was his secretary) The last Ewing mold chips Slim delivered were in 61 or 62. His house was literly jambed with papers and what-not from his business.

That does not mean that Burt Co ( former owner of the mold) or Gamblers General Store ( current owner of the mold)did not deliver some. Being that it has an inlay, I would guess it was made at Burt and delivered by Slim. Hope this at least gives you at starting point.