1937 Pontiac automobile pulling Aerocar trailer for Electrolux

View of an Electrolux salesman with man, woman and a dog in front of a Pontiac car and an Aerocar trailer. Painted on side of trailer and car: "Servel Electrolux, the kerosene refrigerator." Label on back: "Mr. and Mrs. Farmer are about to receive a demonstration of a kerosene operated Servel Electrolux refrigerator. Twenty five Electrolux representatives with specillay [sic] built Aerocar trailers drawn by 1937 Pontiac six cylinder coupes are canvassing the farms of the country from coast to coast giving actual demonstrations at farm homes." Handwritten on back: "Camping, 1937."