1958 Sc 2105-2107 10th International Astronomical Union Congress Scott 2092-2094

1958. 10th International Astronomical Union Congress.
Catalog numbers: Scott 2092-2094, Standard Collection 2105-2107, Mi 2110-2112, Yt 2074-2076.
Issued on: August 12-15, 1958.
Perforation: comb 12¼ x 12.
Printing: Photogravure.
Colors: Multicolor.
Face value: 40 Russian kopek; 60 Russian kopek; 1 ₽.
Quantity: 1,500,000; 1,500,000; 1,500,000.