The 1854 Kellogg Co. $50 gold piece is a notable collectible coin from the United States, specifically issued by the Kellogg & Humbert firm in California during the Gold Rush era. This coin, often referred to as the "Kellogg Fifty," features a distinctive design and substantial gold content, making it highly sought after by numismatists. Coins minted by privately held companies like Kellogg & Humbert are considered important historical artifacts and are valued for both their monetary and collectible aspects, particularly due to their limited production and association with a pivotal time in American history.

Item Denomination Series Year Mint
1854 G$20 Kellogg & Co. Short Arrows, K-1 G$20 Kellogg & Co. 1854 San Francisco
1854 G$20 Kellogg & Co. Short Arrows, K-1 G$20 Kellogg & Co. 1854 San Francisco