Okay, cool stuff (to me at least):

I have a little diecast model SR-71A with a NASA livery. Of course I had to get the NASA livery.

So I did some research, and apparently NASA did have this plane. Only it was a YF-12. Only it wasn’t a YF-12.

NASA was not allowed to have an SR-71 at the time during the Cold War, as it was classified and belonged to the CIA. But one was loaned to them, they modified it with YF-12A inlets and gave it the (already existing) tail number of an also classified A-12. And because the planes were similar, they passed off the SR-71 as a YF-12.

So this model is accurate to a very real aircraft with an interesting history.