1978 Sc 4858-4863 National icebreaker fleet Scott 4721-4726

1978. National icebreaker fleet.
Catalog numbers: Scott 4721-4726, Standard Collection 4858-4863, Michel 4804-4809, Yvert 4559-4564.
Condition: MNHOG.
Issued on: December 20, 1978.
Perforation: comb 11½ x 12.
Printing: Photogravure and Recess.
Size: 52 x 37 mm; 37 x 52 mm.
Colors: Multicolor.
Face value: 4 Russian kopek; 6 Russian kopek; 10 Russian kopek; 12 Russian kopek; 16 Russian kopek; 20 Russian kopek.
Quantity: 7,300,000; 6,000,000; 5,200,000; 4,500,000; 4,400,000; 3,900,000.