1968 SC 3504-3506 War Heroes of the USSR Scott 3430-3432

1968. War Heroes of the USSR.
Catalog numbers: Scott 3430-3432, Standard Collection 3504-3506, Michel 3455-3457, Yvert 3225-3227.
Condition: MNHOG.
Issued on: January 20, 1968.
Perforation: comb 12½ x 12.
Printing: Photogravure.
Size: 42 x 30 mm.
Colors: Multicolor.
Face value: 3*4 Russian kopek.
Quantity: 4,000,000; 4,000,000; 4,000,000.