Celebrate the 10th anniversary of Cosmonautics Day with this First Day Cover featuring cosmonauts Tereshkova and Nikolaev. This 1973 issue from the Russian Federation commemorates the first woman in space and the Vostok 6 mission. The multi-color stamp depicts the cosmonauts. It is a great addition to any space or topical stamp collection. This piece is a true artifact of space history and an excellent way to honor the achievements of the early space program.