For sale is THE INTERNATIONAL COLLECTION OF WORLD WILDLIFE FIRST DAY COVERS. Authorized by the World Wildlife Fund and certified May 20, 1976. Large leather binder, containing 48 pages with 3 first day covers (stamped envelopes) per page. Total: 144 covers. Each cover and informational card is held in an individual, clear-plastic sleeve. This heavy book is roughly 10.5 x 13.25 x 3.25 inches in size. Very Good condition. The covers have a few light scuffs. The back cover has a small tear/crease (see the fourth photograph). The covers and cards are like new--clean and sharp. A terrific set for stamp collectors!