The coin referred to is likely a collectible piece from the United States, specifically from 1851, which would place it in the mid-19th century. Coins from this era can vary significantly in design, composition, and rarity, often influenced by historical events or changes in minting practices. The mention of "G 5" may refer to a grading classification, indicating the condition of the coin, while "Schultz Co" could denote the company or individual involved in its production or distribution. Collectors often value such coins based on their historical significance, demand, and overall market trends.

Item Denomination Series Year Mint
1851 G$5 Schultz & Co. K-1 G$5 Schultz & Co. 1851 San Francisco