A Keystone Postcard projector. It has a black body with two round chimneys. It comes with a long, yellow rubber cord. A plaque on the front shows it is "Model No. 431 Made in the U.S.A. Key Stone Project. 115 Volts 1 Ampere D.C. or A.C. Manufactured by Keystone MFFG.CO. Boston, Mass. U.S.A."