Recently, a white metal die trial of the prototype 4" Centennial Exhibition award medal was offered on eBay (item #330795138801). Though I could not afford even to bid, the consignor has graciously granted me permission to use his photos. I have attached images of the obverse and reverse. The pebbled appearance of the reverse prompted me to question the composition and structure of the medal.

Jonathan Brecher has theorized that it may have been the result of a process that starts with little pellets of metal, then melts and fuses them together. He provided photos of a token that appears to have been produced in this manner. I have attached them as well. (It was Jonathan who suggested this might be a good topic for The E-Sylum).

I would appreciate any information that your always astute members will be able to provide.