1961 SC 2492-2494. Children of the Soviet country. Scott 2487-2489

1961. Children of the Soviet country.
Catalog numbers: Scott 2487-2489, Standard Collection 2492-2494, Michel 2492-2494, Yvert 2409-2411.
Perforation: Comb perf. 12½:12 and 12:12½

Colors: Dark blue and orange. Dark-violet and olive-brown. Brown-grey and red.
Printing: Intaglio tone. Comb perf.
Print run: 3,000,000; 3,000,000; 3,000,000.