American Airlines Logo Signage-RARE 1/1 from OHare Operations offices 1970's For Sale

Extremely rare piece of AA signage memorabilia. My father worked for AA for 45 years in crew scheduling at Ohare (Chicago). This signage hung on the wall in the pilot flight operations office for many years and was taken down when AA shut down and consolidated its flight operations to DFW in the late 1970s. Only one Ive every seen and is a 1/1 piece. The signage is made from a dense, heavy foam, approx 2 inches thick, finished in high gloss blue and orange and has hanging mounts on the back of each of the three pieces. dimensions are shown in the pics.
This is a must have for the serious AA collector or flight crew members office!
Emotional last piece of my fathers Im giving up.