TIMDUDE said:
"The "B" has nothing to do with Boeing. It is the designation for bomber. P was for pursuit, F was actually for photo recon, T for trainer etc. The number was for the design or contract number. This is why some many numbers are missing. Who remembers the B-18 Bolo..."
Thanks Tim,
Looks like I was misinformed, and appreciate the correction. I've edited that part of the post so I won't be misinforming others.