1963 Sc 2786-2788. Formation flying by «East-5» and «East-6» spaceships. Scott 2750-2752

1963. Formation flying by «East-5» and «East-6» spaceships.
Catalog numbers: Scott 2750-2752, Standard Collection 2786-2788, Michel 2769A-2771A, Yvert 2681-2683.
Perforation: comb 12½ x 12.
Color: Brown and violet-lilac. Lilac-brown and bluish-green. Blue and red.
Printing: Photogravure.
Print run: 2,500,000; 2,500,000; 2,500,000.