The A. Rumrell & Co. Coin mark is found on silver pieces produced by A. Rumrell & Co., a 19th-century American silversmithing firm known for working in coin silver, a silver alloy typically composed of 90% pure silver. This mark confirms both the maker and the silver standard used before sterling (92.5%) became the industry norm in the U.S. Coin silver items from this period were often handcrafted and regionally distributed, making pieces marked A. Rumrell & Co. Coin both rare and historically significant. They are valued by collectors for their early American origin and traditional craftsmanship.