Great information. I wonder if they had left such marks someone one uninformed could have considered it a planchet error ? Just asking.
I am always skeptical to buy a key date thats not graded for that reason, some coins are just faked to often, and the fakes keep getting better and better, came across a fake 1912-s V nickel that was such a good fake the coin was almost to nice to be real was what raised questions.
That image will give the counterfeiter a heads up. Images like that are easy to do when using an electron microscope, think it was called... When making carbide drill bit for M.A.Ford mfg. we had to sharpen the diamond grinding wheels. Had a great machine for it that could pull up an awesome image like that. Once we noticed how great it was, we bought a microscope with a monitor feature, software, etc. About $3200.00. I have been meaning to ask if anyone here has a setup like that, for checking coins ? You could really make a nice setup with a coin slide, a stop, and a drop feature. Add a bad of coins to a bin and go to town. Someone really good could write a program looking for 'x" image's... Tough program and matching software would be expensive. Just think for the right investment, it could have a long term money making outcome. Reduces 90% of labor and you can identify ever coin quickly...
I bought a 1912 $2 1/2 Indian at an auction that fooled me. It was of better quality than the mint turned out. I bought it expecting a 64-65 grade. After getting it back in a body bag, I was able to see the tool marks very similar to the ones on this dime. Live and learn. The lessons that hurt the most stay with me the best.