1941 Sc 689A Technics & industry Scott 819

1941. Technics & industry.
Catalog numbers: Scott 819, Standard Collection 689A, Michel 788C.
Issued on: January, 1941.
Perforation: line12½.
Printing: Photogravure.
Colors: Multicolor.
Face value: 50 Russian kopek.
Quantity: 2,000,000.