Wildlife Conservation Series 1956 Pronghorn Antelope

FIRST DAY OF ISSUE NATIONAL WILDLIFE FEDERATION PHOTO. PRONGHORN ANTELOPE WILDLIFE CONSERVATION 1956 Art Craft CUNNISO JUN22 9-AM 1956 COLO GUA WILDLIFE CONSERVATION PRONGHORN ANTELOPE 3 UNITED STATES POSTAGE 3¢ FIRST DAY OF ISSUE