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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:
11751
Obverse Lettering:
DENVER, PIKES PEAK GOLD TWENTY D.
Reverse Lettering:
CLARK GRUBER & CO. 1860
Strike Type:
Business
Coin Shape:
Round
Edge:
Reeded
Variety:
Clark, Gruber & Co.
Variety 2:
K-4
Coin Date:
1860
Denomination:
G$20
Designation:
MS
Mint Location:
Denver, Colorado
Mintage:
15–20 known
Coinage Type:
Private & Pioneer Gold
Coinage Years:
1860-1861
Composition:
Gold
Rarity:
H6
PCGS #:
10138
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Subject: I would like to contribute catalog info to CDN for 1860 G$20 Clark, Gruber & Co., K-4 MS
Body: Referring page: http://beta.greysheet.com/prices/item/1860-clark-gruber-twenty-dollar-territorial-gold-coinage/gsid/11751 GSID: 11751 Title: 1860 G$20 Clark, Gruber & Co., K-4 MS
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Coin Value History
1860 G$20 Clark, Gruber & Co., K-4 MS
Value By Grade
1860 G$20 Clark, Gruber & Co., K-4 MS
CPG (retail) values
Currency
Grade Range
Grading Authority
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Pricing
Values
Greysheet & CPG® Values
| Grade | CAC | CPG Value (Retail) | Greysheet Price (Wholesale) |
|---|---|---|---|
| MS64 |
|
$1,440,000 | $1,234 |
| MS64 | - | $1,200,000 | $1,234 |
| MS60 |
|
$1,234 | $1,234 |
| MS60 | - | $1,234 | $1,234 |
| AU58 |
|
$1,234 | $1,234 |
| AU58 | - | $1,234 | $1,234 |
| AU55 |
|
$1,234 | $1,234 |
| AU55 | - | $1,234 | $1,234 |
| AU53 |
|
$1,234 | $1,234 |
| AU53 | - | $1,234 | $1,234 |
| AU50 |
|
$1,234 | $1,234 |
| AU50 | - | $1,234 | $1,234 |
| XF45 |
|
$1,234 | $1,234 |
| XF45 | - | $1,234 | $1,234 |
| XF40 |
|
$1,234 | $1,234 |
| XF40 | - | $1,234 | $1,234 |
| VF30 |
|
$1,234 | $1,234 |
| VF30 | - | $1,234 | $1,234 |
| VF20 |
|
$1,234 | $1,234 |
| VF20 | - | $1,234 | $1,234 |
| F12 |
|
$1,234 | $1,234 |
| F12 | - | $1,234 | $1,234 |
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 PR
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
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. AU Details--Repaired (PCGS).
$84,000
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. AU-55 (PCGS). CMQ-X. OGH.
$552,000
1860 $20 Clark, Gruber & Co. Twenty Dollar XF45 PCGS. K-4, High R.6. ...
$305,500
$276,000
1860 $20 Clark, Gruber & Co. Twenty Dollar MS64 NGC. Kagin-4, High R.6. To the best of our knowledge, this is the first tim...
$690,000
1860 $20 Clark, Gruber $20 Copper Pattern--Scratched, Cleaned--ANACS. AU Details, Net XF40. K-4a, R.5. Struck as a pattern...
$2,300
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. Unc Details--Repaired (NGC).
$144,000
1860 $20 Clark, Gruber & Co. Twenty Dollar, AU55 NGC. K-4, High R.6. ...
$600,000
1860 Clark, Gruber & Co. Twenty Dollar XF40 ANACS. ...
$3,565
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. AU Details--Repaired (PCGS).
$120,000
$3,105
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. AU Details--Repaired (NGC).
$57,600
1860 Clark, Gruber & Co. $20. K-4. Rarity-6+. AU Details--Repaired, Whizzed (NGC).
$54,000
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Events
Heritage Auctions: US Currency Tuesday Select Auction
Location: Heritage Auctions
Tuesday, June 2, 2026
Heritage Auctions: World Paper Money Tuesday Select Auction
Location: Heritage Auctions
Tuesday, June 2, 2026
Heritage Auctions: US Coins Tuesday & Wednesday Select Auction
Location: Heritage Auctions
Wednesday, June 3, 2026