1987 Sc 5809-5811 Scientists Scott 5600-5602

1987. Scientists.
Catalogs: Scott 5600-5602, Standard Collection 5809-5811, Michel 5757-5759, Yt 5445-5447.
Issued on: October 08, 1987.
Perforation: frame 11½.
Printing: Photogravure and Recess.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 5 Russian kopek.
Quantity: 2,700,000.