• 1851 U.S. Assay Office - Augustus Humbert Values

Greysheet & Red Book® PRICE GUIDE

coin-icon-tr

The Greysheet Catalog (GSID) of the U.S. Assay Office - Augustus Humbert (1851–1852) series of Private & Pioneer Gold in the U.S. Coins contains 7 distinct entries with CPG® values between $19,000.00 and $5,000,000.00. Augustus Humbert, a New York watchcase maker, was appointed United States assayer, and

The Greysheet Catalog (GSID) of the U.S. Assay Office - Augustus Humbert (1851–1852) series of Private & Pioneer Gold in the U.S. Coins contains 7 distinct entries with CPG® values between $19,000.00 and $5,000,000.00.

Augustus Humbert, a New York watchcase maker, was appointed United States assayer,

and he placed his name and the government stamp on the ingots of gold issued by Moffat & Co. The assay office, a provisional government mint, was a temporary expedient to

accommodate the Californians until the establishment of a permanent branch mint.

The fifty-dollar gold piece was accepted by most banks and merchants as legal

tender on a par with standard U.S. gold coins and was known variously as a slug,

quintuple eagle, or five-eagle piece. It was officially termed an ingot.

See More See Less
1851 G$50 Humbert, 880 THOUS, 50 Rev, Lettered Edge, K-1 MS
Value Range: $42,500 - $480,000
$42,500 - $480,000
1851 G$50 Humbert, 880 THOUS, No 50, Lettered Edge, K-2 MS
Value Range: $45,000 - $312,000
$45,000 - $312,000
1851 G$50 Humbert, 887 THOUS, 50 Rev, Lettered Edge, K-4 MS
Value Range: $50,000 - $624,000
$50,000 - $624,000
1851 G$50 Humbert, Target Rev, 880 THOUS, Reeded Edge, K-5 MS
Value Range: $25,000 - $200,000
$25,000 - $200,000
1851 G$50 Humbert, Target Rev, 887 THOUS, Reeded Edge, K-6 MS
Value Range: $19,000 - $430,000
$19,000 - $430,000
1851 G$50 Humbert, Target Rev, 887 THOUS, Reeded Edge, K-6 PR
Value Range: $5,000,000 - $5,000,000
$5,000,000 - $5,000,000
1851 G$50 Humbert, Target Rev, 887 THOUS, No 50, Lettered Edge, K-7 MS
Value Range: $42,000 - $108,000
$42,000 - $108,000

Available on Greysheet Marketplace

View All

Dealer Directory

View All Dealers

Greysheet News

View All News
Consumer Advocate Mike Fuljenz  Wins NLG's Newsletter Award
Consumer Advocate Mike Fuljenz Wins NLG's Newsletter Award
9/15/2026

His free weekly newsletter offers insights on the coin and metals markets, and consumer education.

Incredible Rarities Shatter Records Amid Furious Bidding at  Stack's Bowers Galleries' Summer 2026 Global Showcase Rarities Night Session
Incredible Rarities Shatter Records Amid Furious Bidding at Stack's Bowers Galleries' Summer 2026 Global Showcase Rarities Night Session
9/15/2026

Stack's Bowers Galleries, one of the world's largest and most prestigious rare coin auction houses, is proud to announce record breaking results from the Rarities Night session of its annual Summer Global Showcase Auction.

Five U.S. Coins Bring 7 Figures in $67 Million+ Heritage ANA Auctions
Five U.S. Coins Bring 7 Figures in $67 Million+ Heritage ANA Auctions
9/11/2026

Scandinavian gold rarities also command exceptional results.

Map icon

DAVID LAWRENCE RARE COINS