Check THIS LINK out
As you can see, there indeed WERE 1972 Sprints and in ALL THREE body styles. The convertibles are the real rarities with only 50 made! Maybe you were just referring to the "200" part of the moniker? This model may have JUST been called a Sprint. Even though mine seems to...
It is for sure a 72, because there was no Sprint edition in 73. You can see the special paint job in the door jambs and the seats are for sure the weirdo two tone originals. Plus the title is genuine and matches the vin plate which has not been messed with. As for the '73 lights, someone swapped...