1861 $20 Clark, Gruber & Co. Twenty Dollar (K-8) Struck Over an 1853 U.S. Assay Office Twenty Dollar (K-19) MS62 PCGS. New Kagin designation K-13d (see page 361 of pattern section). Brilliant prooflike surfaces with the center devices sharp and weakness around the edges.
This unique piece was unknown to us until a couple of years ago. We now know of five overstruck Clark Gruber & Co. Twenties. In the upcoming second edition of Private Gold Coins and Patterns of the United States, we plan to list all of these pieces in the pattern section and list them as Set-Up Pieces. This specimen will have the designation 13d.