1000002403.mp4
Maybe NR=Natural/Normal release/ Revision.
And PR= Promotional release/ Revision.
Atari Did have a star raiders sit down attraction At I believe C.E.S. or
Atari HQ I THINK? Don't quote me on that,
but there is news footage of The star raiders sit down online.
The sit down attraction used two atari 800's Custom mounted inside a spaceship cockpit that 2 people would sit inside and control each of there own ships on two separate screens. But maybe there could have been one that used Atari 5200's?
or the PR ones are just promo give away versions, like if you buy a 5200 you get a PR version of said game. Or could have been part of the McDonald's promo that Atari had, a 5200 and star raiders was one of the prizes that could be won.
IDK just speculation.
Here is the link to the news footage
the star raiders set down attraction is around the 8:00 minute mark.