World Wide Fund for Nature - animals, all world, approximate 1976-1979, "the officially collection the World rampantly Life Found First-Day-Covers", impressive collection with 144 illustrated First Day Covers in the appropriate album, as well gesuchtere issues amongst other things Gambia Michel no. 332 / 5.374 / 77, SWA, Mauritius, etc., each issue, verso detailed, German Texts to the reason for issue, sinful more expensive subscription price!