1961 SC 2528. 300 anniversary of Irkutsk. Scott 2523

1961. To the 300 anniversary of Irkutsk.
Catalog numbers: Scott 2523, Standard Collection 2532, Michel 2527, Yvert 2457.
Perforation: comb 12½ x 12.

Colors: Dark-olive, pale-lilac, and brown-black.
Printing: Offset lithography.

Print run: 2,200,000.