DO YOU HAVE COIN DIES AND THEIR COAs?

I have been working on recording specifications of retired coin dies in a spreadsheet. These specifications are obtained from Certificates of Authenticity provided by the mint along with coin dies sold to the public.

That spreadsheet may be seen by clicking on the .pdf link in my article in CoinWeek, February 3, 2026, At this link:

https://coinweek.com/certificates-of-authenticity-for-retired-u-s-mint-dies-what-the-records-reveal/

I would be interested in seeing any COAs anyone may have so that I can keep a copy and add that information to this spreadsheet. (A photo example of this kind of COA is in the article).

If your dies show interesting marks that were not obliterated by being cancelled, can you show me images of them also?

I am also interested in photos of die serial numbers engraved onto the dies.

 

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I have this.

 

Thank you! I do think Encased Coins are interesting! A sample COA of the type I am looking for may be seen in the link.

 

I have a couple other ones also, but not the encased coins to go along with them.
But I'm looking.

 

@Pete Apple I've seen those both on auctions and eBay

 

I check eBay offerings daily for Dies with COAs. You are correct, dwhiz! they appear frequently!

Your dies are most interesting! These are the first dies I have seen for Encasements!