Peter
Agree, 43-4057 is invalid for this airframe.
For some reason it was marked 34037 while displayed at Hendon. (I assume the profile 43-4057 was derived from it ?)
BTW the c/n currently listed for 44-29366 (N9115Z) ..is a little bit off >
I believe it should be: 108-32641 :
-------------------------------------------------------------------
44-29111 thru 44-29910
North American B-25J-20/22-NC Mitchell
c/n 108-32386 thru 108-33185
John