How many people can possibly say they ever saw the MP Chevys (Impalas? Caprices? Biscaynes? ) in Danang's Marine Airwing base?

Steve agrees that they are probably Biscaynes, because like I was figuring, the Biscaynes were the cheapest line of cars for Chevy at the time in this size, and something I had no idea about, the corner fillers in the above cars are black with 5 metal silver horizontal lines 

Thanks Steve!