06/17/2024 12:31:09 PM
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2008 Proof Humbert Commemorative Octagon 2.5 oz Gold Coin NGC Gem Proof

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One of the most prized items in numismatics is the Humbert ingot, an octagonal coin with a fifty-dollar face value produced in California in 1851 and 1852. Known for their gorgeous design and craftsmanship and their substantial precious metal content, these coins have consistently appeared on experts’ lists of the top ten or fifteen most valued collectibles on the market. A limited-edition set of commemorative coins paying tribute to them, released in 2008, have gone on to become sought-after pieces in their own right, create to echo the artistry of the originals in a smaller format. Minted using hand-engraved dies, 2008 Proof Humbert Commemorative Octagon 2.5 oz Gold Coin is available to you in an NGC-certified Gem Proof grade from Provident Metals.


  • Labeled to verify its NGC grade and arrives in a secure plastic container!
  • Issued in 2008!
  • Comes from an exclusive original mintage!
  • Contains 2.5 Troy oz of .9999 Fine Gold.
  • Struck with hand-crafted dies engraved by the famous artisan Ron Landis.
  • Obverse side features an eagle with wings extended.
  • Reverse side features a set of inscriptions.

The 2008 Proof Humbert Commemorative Octagon Gold Coin comes in a secure plastic container and contains two-and-a-half Troy ounces of pure California gold. Its label verifies the Numismatic Guaranty Company’s (NGC) certification of its Gem Proof grade: a cameo finish with sharp raised details offset by mirror-like backgrounds, showing only a few hairline scratches outside of prime focal areas.


The obverse field features an eagle with its wings spread and a rock and shield sitting behind it. This is surrounded by the lettering “UNITED STATES OF AMERICA” and “PURE CAL. GOLD.” At the octagonal rim are the inscriptions “AUGUSTUS HUMBERT,” “UNITED STATES ASSAYER OF GOLD,” “CALIFORNIA,” and “1852.”


The reverse field bears the inscriptions “HUMBERT GOLD INGOT,” “COMMEMORATIVE 2008,” “PURE CALIFORNIA GOLD,” and “2.5 OZ TROY 999.9 FINE,” with an abstract geometric pattern in the background.


As California became an American state in 1850, the question of how to supply enough coinage to support its burgeoning economy became an urgent one. A major early figure in the history of the state’s coinage was San Francisco’s U.S. Assayer, Augustus Humbert, who created the famous octagonal ingots or “slugs” that bear his name. Prized for their unusual shape, gorgeous visual design and their substantial precious metal content, the Humbert ingot is a historically significant numismatic treasure that makes a natural subject for commemorative coinage. The collectibles that celebrate the mid-19th century ingots, now prized items in their own right, were minted using hand-engraved dies created by modern artisan Ron Landis.


Supplies are limited, so the Provident Metals team recommends that you order early to add this remarkable piece to your collection. Call today at 800-313-3315, talk with an agent at our convenient online live chat, or simply send us an e-mail.

How Does Free Shipping Work?

When the subtotal of your purchase, including applicable discounts, is $199 or more, you receive free shipping for your entire order. In order to receive free shipping on purchases of $199 or more, you must live within the 50 US states. For orders less than $199, a $9.95 shipping fee applies. All products are discreetly packaged and shipped with full insurance included.

When will my order ship?

Most Provident orders are shipped within one (1) business day of your payment clearing. Payments made via PayPal clear instantly. Bitcoin payments clear instantly once the transaction is confirmed. Credit Card and bank wire payments process within 1 business day. ACH and paper check payments take 3-5 business days. Once payments are processed, products are released to fulfillment for packaging and shipping.

Can I choose the method of shipping?

All orders of $199 or more that are eligible for free shipping are, by default, shipped via a carrier of our choice (USPS or UPS). Depending on the contents and size of your purchase, you may be able to upgrade to a specific carrier during checkout.

Will I need to sign for my package?

For those orders of $999.99 or less, there is no need to sign for your package. However, you may select the option to require a signature at delivery if you want. This can be chosen and paid for at checkout. All orders of $1000 or more require a signature to complete delivery.

What about International Orders?

Provident is only able to ship to addresses in any of the 50 US states. This includes P.O. boxes and APO addresses.

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Product Details

Year 2008
Condition Gem Proof
Grading Service NGC
Mint Mark Not Shown
Metals Purity .9999
Condition Gem Proof
Edge Style Smooth
Product Series Humbert Gold Ingot Commemorative
Certificate of Authenticity No
Packaging Plastic Slab
Metal Content 2.5 Troy Ounces
Shipping Orders over $199 Ship Free
Provident ID 3998714