1973 Sc 4163-4165 BL 89 Cosmonautics Day Scott 4073

1973. Cosmonautics Day.
Catalogs: Scott 4073, Standard Collection 4163-4165 BL 89, Mi BL 86, Yt BF 85.
Condition: MNHOG.
Issued on: April 12, 1973.
Format: Souvenir Sheet.
Perforation: frame 12 x 11½.
Printing: Photogravure.
Size: 75 x 100 mm.
Colors: Multicolor.
Face value: 60 Russian kopek.
Quantity: 900,000.