Buffalo nickels are one of the most iconic coins of america and there are many of these nickels that have lost their dates through circulation and build up of muck in that area. i also know that cleaning a coin devalues the coin significantly but since these nickels are dateless they don't hold any value anyway so i am wondering what is the best way to restore the date. i heard vinegar works well but you need time (like a few days) and there is nic-a-date but i have seen some of those coins and it leaves a discolored spot in the area that you place the substance. what method do you guys use?

other than currency and collectibles coins can also be crafted into jewelry such as rings, belts, necklaces, earrings, and other forms. i myself don't appreciate seeing coins in this state but it is interesting to see what other people, besides for collectors use old coins for. looking through different coin sellers' items i have noticed many holed coins and the main reason for these holes is in fact for the use of jewelry mainly necklaces (stringing a thread through the hole). there may be other reasons for making a hole in a coin but that is the biggest one i have seen.