50 years of first Human flight into space.

On 12th April Russia Post released a Sovenir Sheet of 50 Rubles to celebrate the anniversary of the first manned flight into space. April 12, 1961 at 9:00 07 minutes Moscow time, the spaceship "Vostok " with YA Gagarin on board was launched into Earth orbit from the Baikonur cosmodrome.After the flight, Yuri Gagarin, was awarded the title Hero of the Soviet Union, and April 12 was World Day of Aviation and Astronautics.

The SS depicts a portrait of YA Gagarin, spaceship "Vostok".