1978 Sc 4799I 12th Definitive Issue Scott 4602A

1978. 12th Definitive Issue.
Catalog numbers: Scott 4602A, Standard Collection 4799I, Michel 4749w, Yvert 4749w.
Issued on: August 4, 1978.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 18.5 x 26 mm.
Colors: Cobalt blue.
Face value: 15 Russian kopek.
Quantity: 12,000,000.