I purchased these three photos on EBAY in March 2004. Each is stamped on the back, "North American Aviation AJ-2P." The second has the added hand-written notation, "AJ-2P-4 Public Relations Files."
The AJ-2Ps, as were the AJ-2s, were built in Columbus, Ohio. The background terrain in the third photo does indeed seem to be Ohio. That, together with the backstamps and the fact that there are no squadron markings on the plane, lead me to the conclusion that the plane was still in the hands of the manufacturer at the time the photos were taken.
Although not very distinct, the BuNo. seems to be 128046 in the second photo. (It is not detectable in the scan.) In the third photo, one can detect the white printing of the BuNo., but it cannot be read.
I am making the assumption that all three pictures are of the same aircraft.