1860 Clark, Gruber & Co. $20 Die Trial. K-4a. Rarity-5. Gilt Copper. Reeded Edge. AU-50 Burnished, Scratched (Uncertified).Light golden yellow surfaces support plenty of bold striking detail to the major design elements. A few laminations are evident at the lower right reverse border, and there are some unfortunate scratches in that area. Although not as rare as once thought, these Clark, Gruber & Co. die trials are still scarce. The 1860 K-4a type offered here is particularly desirable given the legendary rarity of the firms regular issue "Mountain Twenty" of the same date.From our (Stacks) ANA National Money Show Auction of March 2002, lot 1284. Lot tag included.