Cow Leather Coin Case Nappa Nevia - Wax BlackDESCRIPTION iolom Collection. This coin case is a bespoke FASCINATE piece and is made with full vegetable tanned Nappa Nebbia leather with a waxed surface. As the mouth of the pocket is wide, there is space to store cards, so you can use it as a business card holder as well as a coin case. There are brass metal fittings on the outside as well.