1967 Tarihli Sovyet Pulu

 Olası uzaylı uydularını öngören Sovyet pulu.
"ПОЧТА СССР-КОСМИЧЕСКАЯ ФАНТАСТИКА-Спутник внеземной цивилизации"
 "POÇTA SSSR-Kosmiçeskaya Fantastika-Sputnik vnezemnoy tsivilizatsii"
 "SSCB POSTASI-HAYALİ UZAY-Dünya dışı medeniyetlerin Sputnik'leri"

Ministry of Communications of the USSR. The design of the stamp by Andrey Sokolov. Scanned by Dmitry Ivanov. - From a personal collection.

Science fiction. Satellite of Extraterrestrial Civilization by Andrey Sokolov (1931–2007). Paper, tempera. 1965–1966^[1]. The stamp of the Soviet Union, 16 kopecks, 20 October 1967, CPA Catalogue No 3549, Michel No 3407, Scott No 3386, Yvert No 3286. Coated paper. Offset printing. Perforation: comb 12×12½. Size of the stamp: 32×40 mm. Print run: 3,000,000.

 https://tr.wikipedia.org/wiki/UFO#/media/File:1967_CPA_3549.jpg