1948 Sc 1257-1259 Sverdlovsk Scott 1307-1309

1948. Soviet Air Fleet Day.
Catalog numbers: Scott 1307-1309, Standard Collection 1257-1259, Michel 1298A-1300A.
Issued on: November 15, 1948.
Perforation: 12½.
Printing: Photogravure.
Colors: Multicolor.
Face value: 30 Russian kopek; 40 Russian kopek; 1 ₽.
Quantity: 350,000; 700,000; 700,000.