Gherman Titov signed Vostok 1 cover

Gherman Titov signed 1991 Vostok 1 30th anniversary, Benham cover. 

Titov became the second human to orbit the Earth and the fourth man in space when he piloted Vostok 2 in 1961. He was only 25 years old during the mission which lasted over a day and orbited the Earth 17 times. Titov actually manually piloted the spaceship for a period of time and took the first manual photographs from orbit, as well as capturing the Earth on film.