1957 Sc 1957 International Philatelic Exhibition Scott 1979

1957. International Philatelic Exhibition.
Catalog numbers: Scott 1979, Standard Collection 1957, Michel 1978B.
Issued on: July 27, 1957.
Perforation: Imperforate.
Printing: Photogravure.
Color: Multicolor.
Face value: 40 Russian kopek.
Quantity: 30,000.