1948 Sc 1201-1203 Heavy Engineering Scott 1272-1274

1948. Heavy Engineering.
Catalog numbers: Scott 1272-1274, Standard Collection 1201-1203, Michel 1262, 1264-1265, Yvert 1272, 1274-1275.
Issued on: October 14, 1948.
Perforation: line 12½.
Printing: Photogravure.
Size: 37 x 24 mm.
Color: Black; red brown.
Face value: 30 Russian kopek; 50 Russian kopek; 60 Russian kopek.
Quantity: 200,000; 500,000; 600,000.