
1855 Kellogg $50, graded PF-63.
Two NGC-certified rarities from the Gold Rush era are set to sell for six figures
Two NGC-certified California gold “slugs” from the 1850s are bringing excitement to Heritage Auctions’ U.S. Coins Signature Auction in Chicago on October 11.
An 1855 Kellogg $50, graded PF-63, is among the finest-graded of the 12-15 known survivors of an original mintage thought to number about two dozen.
Kellogg & Co. produced $20 gold “slugs” in 1854 and 1855 as the new San Francisco Branch Mint was still gaining its footing. It is unlikely the Kellogg $50 pieces were created for circulation, but rather to prove the company could produce the same kind of pieces a competitor was minting.

1851 Humbert 887 with “50” $50. Hover to zoom.
Meanwhile, another Gold Rush era rarity, an 1851 Humbert 887 With “50” $50, graded MS-63, is the finest-known example of this particular version of the octagonal ingots produced by U.S. Assayer Augustus Humbert just a few years earlier.
Other NGC-graded highlights in Heritage Auctions’ U.S. Coins Signature Auction in Chicago include:
Lot 3038: An 1873-CC Arrows quarter, graded AU-55;
Lot 3070: A 1794 Flowing Hair dollar, graded VF Details;
Lot 3137: An 1895 Morgan dollar, graded PF-62;
Lot 3179: An 1864-S $10, graded AU-55;
Lot 3196: An 1854 Large Date $20, graded MS-64.
Press release courtesy of the Numismatic Guaranty Corporation.
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