Mammoth Onyx Cave Kentucky. Manufactured by Goldfarb Novelty Co. New York City. The manufacturing information appears on the back side of the decal backing. The decal's backing is 4 1/8 x 4 1/8 inches; the decal itself is circular with a diameter of 3 7/8 inches. In the center of the decal is a color rendering of the Paradise Garden formation. Guaranteed original to the 1940's - 1950's as it has been in my family since then. My father, William E. Davies, a geologist, explored and mapped hundreds of caves in Appalachia from the late 1940's -1960's and never hesitated to pick up a nick-knack from local commercial caves he would pass on the road. Ships carefully packaged via Ebay Standard Envelope and Ebay International Shipping.