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Bulgaria: Vostok 5 / 6
Issued: 26 August 1963

Valeri Bykovsky

Valentina Tereshkova

Vostok 5 & Vostok 6 orbiting Earth

Valeri Bykovsky and Valentina Tereshkova

Vostok 5 and Vostok 6 over Spasski Tower (imperforate souvenir sheet of 1 stamp)

Scott #s C99-101, CB3 and unlisted souvenir sheet
Last Modified: 2008-07-30