1975 Sc 4387-4388 30 years of Liberation of Hungary and Liberation Czechoslovakia Scott 4306-4307

1975. 30 years of Liberation of Hungary and Liberation Czechoslovakia.
Catalogs: Scott 4306-4307, Standard Collection 4387-4388, Mi 4339-4340, Yt 4128-4129.
Condition: MNHOG.
Issued on: March 14, 1975.
Perforation: comb 11½.
Printing: Photogravure.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 2*6 Russian kopek.
Quantity: 4,200,000; 4,100,000.