I have four silver wheat back Lincolns, one being a 1943, all stamped on dime planchets. These are common to find in big rare coin auctions but i’d guess that because of their rarity, oft-planchet coins were never lost.
Many of the cheaper examples were cleaned, scratched or filed on the edge to test for plating. It’s too bad that the owners cut the value in half by doing so. Cheap ones sell for $300-500/each. My 1943, albeit damaged, is a $2000 coin.
Metal detectors are a good tool to test for genuineness.
I found a 1958 silver wheat penny this morning, and I've never seen one like it before. It is stamped from Delaware and the edges are raised up. They are also smooth. Has anyone found one of these before, or have any information about it?