SCG2977 - U.S. 1966 National Park Service 50th Anniversary StampThis 5 cent U. S. postage stamp was issued in 1966 to commemorate the 50th anniversary of the National Park Service (19161966). It features a bold, modern design with a stylized green triangle symbolizing forests and wilderness on a gold background. The three inner dots suggest trees or campsites. The clean and geometric aesthetic reflects mid century design trends. This stamp honors the vital role the NPS has played in preserving America's natural