Antique 1920s Motor Phone Car Mobile Tube Radio

This is an Rare Original Antique 1920's Motor Phone Car Mobile Tube Radio RCA Speaker Store Display Poster.  It is in good cosmetic condition with wear from storage and age.  The poster measures 17" wide and 11" tall.  This would've hung as a store display in the windows.  This came from an old radio store that has since gone out of business and has been in storage since the 1920's.  Thank you!