I got these chips from an ebay seller who had 20-30 different lots available from the Zanuck estate. Things like his copy of movie scripts and other personal items that were definitely part of the Zanuck estate. I also received a certificate of authenticity signed his daughter Darrylin. I don't put much credence in the certificate but I do believe that these were his due to the quantity of other items being sold.

I am sorry about the wrong email adress also. It should be corrected now.