1933 Jehovah's Witness public address speaker adorned trailer in Charleston West Virginia 1933. Religious stuff was quite prominent in the lean tough years following the great depression

How all these loud speakers amplified to be heard from a block away didn't get people ticketed for disturbing the peace is a mystery

Looks like a  Curtiss Aerocar trailer  http://www.mackeysclockrepair.com/more_old_west_virginia_pictures.html