The 2002-D without a copper layer was likely etched by acid (but wait for a more experienced opinion on that). The 1957-D is definitely not a proof. (And no proofs were struck in Denver anyway.) It appears to have been plated or chromed somehow. This was often done for coins that were put on the vintage charm bracelets that were in vogue around the 1950s and early 1960s. That slight irregularity at 6:00 on the rim at the bottom of the reverse may or may not have been where there was an attachment to put it on the charm bracelet. It is worth face value as-is. Maybe two or three cents since it's a Wheatie. What did you want to know about the 1943 steel cents?
This is just a guess, but the 2002D looks like environmental or chemical damage. No proofs were struck in Denver in 1957.
The 2002-D looks like environmental damage. It could also be from acid so it's PMD or post mint damage. The 1947-D was minted in Denver so not a proof. It looks like it was plated at one time but is wearing off. The 1943 steel Cents are all normal. I can buy them for $.17 each at my LCS, local coin shop. Welcome to CT.
Welcome to CT @Sportlavaca. Your questions have already been answered so there isn't much more to offer. Are U.S. cents your area of interest? There are several very good sites that are very helpful if you are interested. http://lincolncentsonline.com/index.html http://www.lincolncentresource.com/index.html To name just a couple. Good luck on collecting.
Actually I'm really enjoying all coins, in fact could yall help me out with this dime? Not sure of the date. It looks like it was punched on a wrong blank. But I'm just guessing!! Its weight is 2.0 grams..
I heard we make or use to make coins for other countries and I've heard of blanks getting mixed in. I have no idea thats why I am asking, I would like to learn these things and I appreciate everyone that has taken the time to help with my curiosity..