1978 Sc 4771 11th World Youth and Students Festival Scott 4648

1978. 11th World Youth and Students Festival.
Catalogs: Scott 4648, Standard Collection 4771, Michel 4721, Yt 4478.
Issued on: May 17, 1978.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 30 x 42 mm.
Colors: Multicolor.
Face value: 4 Russian kopek.
Quantity: 5,150,000.