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Tereskova and Bykovsky signed cover, Space, &, 75, 1977, 1st, airmail, bykovski, chaucer, collectables, dedicated, fdc, russian, signed, sp1102, space, stamp, tereskova, valentina, valery, woman, Space, Tereskova and Bykovsky signed cover, &, 75, 1977, 1st, airmail, bykovski, chaucer, collectables, dedicated, fdc, russian, signed, sp1102, space, stamp, tereskova, valentina, valery, woman.