Thanks, RB!
I first saw that weird headstamp three or four years ago, on .45 ACP range pick up. It didn't look Hebrew or Arabic, so I just shrugged and put them in the miscellaneous brass can.
it was in testing.
then it was brought forth for almost a half century, then it was rescinded until the 1990's,,, and here we are plagued with it again.
No, the Anunnaki. They didn't give the Assyrians the 9mm because they wanted them to prosper. Then a Vimana crashed in Georg's back yard with some old cartridges still stashed by the spare plasma ignitor and the rest is history.