This is what I was told: The badges came from a WW2 Vet's estate- obviously he had access to military buildings or the facility that produced these, because he picked up so many of them at the same time. They were in buckets covered in mud under the porch.
Anyone know a good place to trade these? Any contacts? I really only need 30-40 badges and don't want to get stuck selling the rest for 500 years