About those items Mike Sanders mentioned. There have been a few discussions of them on the PCGS forum, and "The Penny Lady" Charmy Harker said she is writing an article.

I have one of them and vaguely remember the seller mentioning they were originally promoted by the Boy Scouts, but I have no reference to back that up. Anyway, here are a couple links and pictures.

Wikipedia attributes these to "local coin dealer" Louis Werner. I've also seen them attributed to Tatham Stamp and Coin, but without supporting references. Since Tatham published numerous catalogs, I presume anything of this nature that they produced would be listed in one or more of them ... perhaps some E-Sylum reader with a Tatham catalog collection could check.

I have the Morro Castle, Hauptmann trial and Byrd Expedition pieces in my collection, but have not seen the Joe Louis or Christmas items ... something else to look for on my "bucket list". Somewhere in my vast Exonumia Closet I have a custom Capital Plastic holder with eight capped cents in it. I believe that they are only the three mentioned above, but with various metals used for the cap (bronze, brass and silver, if I remember correctly).