Keywords: Wildlife salmon 1956 U.S. stamp.1.jpg en Wildlife conservation was highlighted with a series of three commemorative stamps in 1956 The 3-cent King Salmon stamp was issued November 9 1956 designed by Robert W Bob Hines a government artist at the Department of the Interior 1956-11-09 U S Postal Service; http //arago si edu/category_2029398 html National Postal Museum Bureau of Printing and Engraving PD-USGov Commemorative stamps of the United States Stamps of the United States 1951-1960 Works by Robert W Hines Fish on stamps 1956 stamps of the United States Green stamps |