拍品描述： 1860 Clark, Gruber & Co. $20 Die Trial. K-4a. Rarity-5. Copper. Reeded Edge. MS-63 BN (NGC). This endearing piece is exceptionally well preserved and attractive for this eagerly sought type. Both sides exhibit swirls of copper-rose to dominant golden-brown patina, direct lighting calling forth original color in light champagne-pink. Highly lustrous with a satiny finish, the surfaces are uncommonly smooth even for the assigned grade, especially the reverse. Sharply to fully defined and sure to catch the eye of advanced collectors. A fair number of these were struck in copper, much to the delight of todays collectors as the 1860 Clark, Gruber & Co. "Mountain Twenty" struck in gold is a classic rarity that requires a formidable budget to purchase.

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