Well, I'm young enough that "vintage" = Vietnam era, so how about:
I carried one of these for years, earlier in my military career. Bulletproof 420 denier nylon. I have one in storage, back in the U.S. You can find them in surplus stores for a LOT less than this website is charging for one, especially since the U.S. military converted to a new load-bearing system within the last decade or so.
Definitely NOT ultralight... :)