I had 2 - came complete with the 4 pc porc spacer frame that held it to the pole. I paid $200 for all (that was 9 years ago...signs were in 8+ cond). I have one on my garage and the other like I said I just sold. I got $200 for it....dated 1959 as well.
I agree with tooter, That rust will wipe/scrub right off.
DOC @ THE AMERICAN GARAGE