[PIF]

That is the prototype - Also known as the “Titanium Goose,” #927 was the only “B-model” in the A-12 series. SR-71s were later.

http://www.habu.org/a-12/06927.html

[QualityMan]

cool

there is an A-12 in the air museum in Kalamazoo, MI, adjacent to their small airport.

if you are ever in that area, it is worth a visit. they have lots of old warbirds, as well as a Phantom, and some other assorted stuff.