USSR Poland Maximun Card: Space Cosmonaut Valery Bykovsky Vostok 5 (Vintage PC 1963)

this is a highly interesting cross-border space maximum card (tarjeta maxima) featuring soviet cosmonaut valery bykovsky, the pilot of the historic vostok 5 spaceflight.
the front features a color portrait postcard published in the ussr. it is franked with a matching polish stamp from 1963 commemorating his flight, inscribed "w. f. bykowski - 119 godzin w kosmosie 14-19.vi.1963".
the stamp is officially cancelled with a circular polish special postmark from poznan pałac kultury, celebrating the 46th anniversary of the october revolution ("46 rocznica rewolucji pazdziernikowej").
the back of the postcard is unused and unwritten. it features the official cyrillic text of the soviet publisher "izdatelstvo pravda" along with the original printing date 15/vi-1963 r. and the retail price of 2 kopecks. it shows a small paper disturbance/thinning on the bottom right corner of the reverse side.

size: ~ 15 x 10.5 cm (1 cm ~ 0.39 inch)

postally unused

condition: very good..staining....please also refer to scans which show complete front and back of postcard

ansichstkarte, ak, postkarte, postcard, carte postale, tarjeta postale, 葉書, kosmonaut