1976 Sc 4608-4611 National icebreaker fleet Scott 4532-4536

1976. National icebreaker fleet.
Catalogs: Scott 4532-4536, Standard Collection 4608-4611, Mi 4558-4562, Yt 4324-4328.
Condition: MNHOG.
Issued on: December 22, 1976.
Perforation: comb 12¼ x 12; comb 12 x 12¼.
Printing: Offset lithography and Recess.
Size: 52 x 37 mm; 37 x 52 mm.
Colors: Multicolor.
Face value: 4 Russian kopek; 6 Russian kopek; 10 Russian kopek; 16 Russian kopek; 20 Russian kopek.
Print run: 6,500,000; 5,900,000; 5,000,000; 4,300,000; 3,800,000.