1940 Sc 645I K. A. Timiryazev Scott 781

1940. K. A. Timiryazev.
Catalog numbers: Scott 781, Standard Collection 645I, Michel 750, Yvert 801.
Issued on: June, 1940.
Perforation: line 12½.
Printing: Collotype.
Size: 34 x 23 mm.
Color: Multicolor.
Face value: 15 Russian kopek.
Quantity: 500,000.