Whitman Expo
Demand for early copper and Colonial-era numismatic treasures drives strong results in Heritage Auctions' July 13 Early Copper & Colonial U.S. Coins Showcase Auction
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The Clark Gruber “Mountain $20,” has been considered a key to the pioneer gold series since the early 20th century. Today, there are only 15 examples encapsulated at either of the third- party grading services, and a trio of genuine, ungradable examples are known. There are three uncirculated Mountain $20s in private hands, and any lustrous, original coin would qualify for the condition census. In 2006, numismatists Andy Lustig, Ron Karp, and David J. McCarthy discovered a proof striking of the Mountain $20 that apparently traced its provenance back to Emanuel Henry Gruber.
Obverse Description
Mountain above DENVER encircled by PIKES PEAK GOLD TWENTY D.
Reverse Description
Federal eagle CLARK GRUBER & CO. 1860
Catalog Information
GSID:
376019
Obverse Lettering:
DENVER, PIKES PEAK GOLD TWENTY D.
Reverse Lettering:
CLARK GRUBER & CO. 1860
Strike Type:
Proof
Coin Shape:
Round
Edge:
Reeded
Variety:
Clark, Gruber & Co.
Variety 2:
K-4
Coin Date:
1860
Denomination:
G$20
Designation:
PR
Mint Location:
Denver, Colorado
Mintage:
unique
Coinage Type:
Private & Pioneer Gold
Coinage Years:
1860-1861
Composition:
Gold
Rarity:
Unique
PCGS #:
10147
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1860 G$2 1/2 Clark, Gruber & Co., K-1 MS
Worth: $3,800 – $90,000
1860 G$5 Clark, Gruber & Co., K-2 MS
Worth: $3,250 – $360,000
1860 G$10 Clark, Gruber & Co., K-3 MS
Worth: $12,500 – $240,000
1860 G$20 Clark, Gruber & Co., K-4 MS
Worth: $200,000 – $1,200,000
1861 G$2 1/2 Clark, Gruber & Co., K-5 MS
Worth: $3,200 – $96,000
1861 G$5 Clark, Gruber & Co., K-6 MS
Worth: $3,600 – $67,200
1861 G$10 Clark, Gruber & Co., K-7 MS
Worth: $5,600 – $108,000
1861 G$20 Clark, Gruber & Co., K-8 MS
Worth: $42,000 – $275,000
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Events
Midlands Coin Club Coin, Currency and Collectibles Show - SC
Location: Medallion Center
Friday, May 1, 2026
