1981 Sc 5172-5173 Soyuz T-4–Salyut 6 Scott 4991-4992

1981. Soyuz T-4–Salyut 6.
Catalog numbers: Scott 4991-4992, Standard Collection 5172-5173, Michel 5122-5123, Yvert 4857-4858.
Condition: MNHOG.
Issued on: October 15, 1981.
Perforation: comb 11¾.
Printing: Offset lithography.
Size: 32.5 x 32.5 mm.
Colors: Multicolor.
Face value: 2*10 Russian kopek.
Quantity: 4,500,000.