1931 Sc 270 Designing an Airship Scott C19

1931. Designing an Airship.
Condition: MHOG.
Catalog numbers: Scott C19, Standard Collection 270, Michel 401C.
Issued on: May 15, 1931.
Perforation: Imperforate.
Printing: Photogravure.
Colors: Multicolor.
Face value: 1 ₽.