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.