First Day Covers (2) dedicated to 1 year anniversary of the joint flight of spacecrafts Vostok 5 and Vostok 6 signed by cosmonaut Valentina Tereshkova (Vostok 6) and cosmonaut Valery Bykovsky (Vostok 5).

The covers issued by Ministry of Communications of USSR, printed in May 5, 1964.

Cover signed by Valentina Tereshkova stamped in Star City lately, Dated April 15, 1973 dedicated to 10 years Anniversary of flight of World first woman in space: woman-cosmonaut V.V. Nikolaeva-Tereshkova.

The seal depicted Vostok 6 on launch pad, stars and partially seen letters USSR.

The cover signed by V. Bykovsky stamped in Star City lately, Dated April 12. Dedicated to Cosmonautic Day.

The covers are in good condition. Rare.