Block of USSR, issued to the 500th anniversary of Giorgione. 50 kopecks, multicolored, offset printing with varnishing on ordinary white paper, with black text on back "FACTORY OF STORING" all over block. Block glued to cardboard on top edge. Draft. Block has not gold coating and a bit different in color as issued block. Condition: original gum, little damage the bottom right corner of stamp. Very rare.