1941 Sc 690A Technics & industry Scott 820

1941. Technics & industry.
Catalog numbers: Scott 820, Standard Collection 690A, Michel 789A.
Issued on: January, 1941.
Perforation: line12½.
Printing: Photogravure.
Colors: Multicolor.
Face value: 50 Russian kopek.
Quantity: 2,000,000.