Check the listing for details. Antique Illinois Razor Strop Co No. 6509 Leather Razor Sharpening Strap. Condition: Used. Listed at 40.00 USD. The Antique Illinois Razor Strop Co No. 6509 Leather Razor Sharpening Strap is a vintage collectible used for honing and sharpening razors. Made of high-quality leather, this razor strop is designed to provide a smooth and precise cutting action, perfect for maintaining the sharpness of razors. The strap can be strung onto a sharpening stone or a sharpening wheel, allowing for easy and efficient razor maintenance. This antique piece adds a touch of nostalgia to any shaving or grooming routine.