1971 SC 3943 50th Anniversary of Hydrometeorological Service Scott 3860

1971. 50th Anniversary of Hydrometeorological Service.
Catalogs: Scott 3860, Standard Collection 3943, Mi 3891, Yt 3728.
Condition: MNHOG.
Issued on: June 21, 1971.
Perforation: comb 11½.
Printing: Photogravure and Recess.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 10 Russian kopek.
Quantity: 3,500,000.