||postally unused; caption: "Everglades National Park"; "G.474-Gulf Stream Card & Distributing Co., Miami, Florida"; "Curteichcolor® 3-D Natural Color Reproduction (Reg. U. S. A. Pat. Off.)"; "American Egret and Young at Everglades National Park, Florida"; "America's youngest National Park, where vast flights of exotic and colorful birds gather to feed and nest."; "SCK-2215"