This antique vintage Carborundum hone sharpening stone with original box from the 1900s is a rare find for collectors of vintage knives and blades. The stone is made by Carborundum, a trusted brand known for producing high-quality sharpening tools. The authenticity of the stone is confirmed as original, and it has not been modified in any way. The stone originates from the United States and comes with its original box, adding to its value and significance as a collectible. This sharpening stone is perfect for those who appreciate the art of maintaining knives and blades. 1900s Carborundum Dry Razor Hone no 160 stone in Original Box Advertising 1904 Saint Louis, Antique Sharpening Stone Tool Collectible.