I was reorganizing part of my box collection and came across a box from the Philippines, the back label picture of which, below, is self-explanatory. I got this box many years ago, along with a couple of cartridges turned into key chains. Later, I was able to get one loaded round, obviously a range pick up (a bit beat up). It is ordinary ball ammunition, GM FMJ RN bullet, brass case, brass primer cup, Headstamp " RPA 97 9mm ".
To date, I have not seen another one, nor even seen any rounds of this headstamp around.