Looks like an average 39 nickel to me I'm not seeing any of the correct markers on your coin. http://www.error-ref.com/henning-counterfeit-nickel/ https://coinweek.com/counterfeits/a...irst deposit of,six reverse) of various dates.
These guy had a good discussion about Henning Nickels. https://www.cointalk.com/threads/finally-found-a-1939-henning-nickel.336891/
I agree with our fellow enthusiasts. A 1939 with some environmental toning. What is interesting though is what is going on in STATES. Almost looks like 'dots' in between the letters.
When you said "dots" the first thing that came to my mind was something left from a Rockwell Hardness Test. I've only seen pics of that on cents, but I guess the mint(s) could apply the test to any coin if they wanted to. Probably wrong, but I noticed the anomaly also. https://www.error-ref.com/rockwell-test-mark-left-in-die/
I know what you are talking about but penetrator marks are incuse. What I see in STATES looks like bumps. Could be a sign of heavier corrosion from environmental conditions. The photos are good but just a touch out of focus for a better diagnostic. To your comment though, I think it is reasonable to conclude that any denomination planchette could be subject to hardness testing and replacement to the population of planchettes. And from what I’ve read, the theory might be in question. In my experience, so much happens at the surface of material during coining that a penetrator mark would be eliminated. Especially on a cent planchet. So much to learn and consider about our hobby.
