Syracuse, New York: Electro-Magna Coil Co. circa 1931. 9 x 14 inches, double folded into a brochure sized for mailing. Creased, some edgewear, browned. Good. 
A brochure for the Electro-Magnetic Rays created by the Electro-Magna Coil. Internal sections with many testimonials, an images of the device on the front panel, and (importantly to those paying attention) a price of $39 "far below its real value" but with the "after 8 days free trial in your home" inked out.