Vintage The Carborundum Co Two Sided Knife Sharpening Stone Silicone Carbide USA For Sale

This stone is in good condition. Both sides are flat with fairly sharp edges. The stone has no visible cracks breaks or chips. The cardboard box is in decent shape. The box has staining and discoloration but its intact with no rips. I am open to all reasonable offers. I also provide combined shipping so please look at my other items on my page. Thank you for your business.