1972 Dart Swinger Special

I have a 1972 Dart Swinger Special. What make's it so special? Is this just a dealer add on or something/ THe car was originally white, with black interior, a/c, and a 6cyl, I am pretty sure, if I remember correctly. It has the Dart emblem on the 1/4 panel, just below the 1/4 glass and has "Swinger" and a rectangle "Special" emblem under that on each front fender. Fill me in on the rest of the story.

Thanks,

Mike