Vostok spacecraft installation Published on April 12, 2019 in 12 April 1961, 06:06:59.7 UTCFull resolution (800 × 584) ← Previous Next → Vostok spacecraft installation. Workers installing a Vostok spacecraft. Vostok were Soviet spacecraft used as part of the Vostok programme, which flew six manned spaceflights between 1961 and 1963. Photographed in 1961.