Cuba 1960 - Sc C211 Souvenir Sheet + Sc 209-10 stamps, (EDIFIL 823 + 821-22) on a First Day cover.
The stamps and Souvenir Sheet issued to celebrate the 1960 Stamp Day on a Lily cacheted, unaddressed First Day cover. The Official cachet was applied in black on front. A CUBEX Exposition "Last Day" (April 30th) cachet was also applied on front in blue. Very nice cover