Quote:
@Bobby
How do you know it's man made? Both planchets were in the building at the same time. Plus there are others like it. Certainly could be an honest mistake. I know if I sent it in and they denied it as man made I'd be fuming because it's certainly plausible.
If you're going to say this is man made, you'd have to say every single one ever is man made. This is about as plausible as it gets.
I will try to explain you. In the next photo you has the employees of the mint for that year (Mint report), then I explain:

then now. This was the old Mint building, 3 floors production. !floor for small denominations no precious metal, one for Silver and gold small diameter and the third for large Diameters coins Gold and Silver.
the Mint operate in that time 2 coining shifts 3 shifts introduce in 1963) and very restraint floors movement of the personal. So during the Night shifts you has Custodial, 75 % of Mechanicals and Miscellaneous as engineering's, a small director and such functions. The supervisors enter in Custodial others.
During the Night shift the Mechanicals can move from floor to floor in order to prepare and test the presses for next day. There was produce all or majority of the wrong planchet. By the old investigations, 95% of those coins come from Mint employees and not from coins release.
The report give a clear way how they surveil every grain of silver and gold and also the Zinc-coated steel. and other thing: Nickel's/Quarter's presses was never use for cents or Dime.
Your coin is recognize? Yes. My point was the provenance and Minting process. After 80 years from was produce if those coins do not come-up in big quantity the Reserve will not take steps.
My remarks in the first post address complete other issues and points, Not if it is recognize error or not. The theories "Same building, same Mint, etc" sorry Bobby do not work for me because has no really bases.
If you want full report I will send you, just PM me.