That looks like new production brass. Why would they go to the trouble of removing the headstamp? Doing so would anneal the head. I doubt it's reworked WW2 era stuff.
I wonder who made the brass cases for the Russians. Wolf Gold was either S&B or Privi.
From some of the other links posted, it appears to be refurbished 1930s German ammunition. The rounds were disassembled, checked, and then re-primed with non corrosive primers. There is some evidence that it was manufactured for the Romanian air force and was captured by the Russians, where it has sat for years before Techcrim purchased it and refurbished the rounds. The brass is 1930s manufacture.