1980 Sc 5057 Birth Centenary of A.F.Ioffe Scott 4870

1980. Birth Centenary of A.F.Ioffe.
Catalogs: Scott 4870, Standard Collection 5057, Michel 5007, Yt 4741.
Issued on: October 29, 1980.
Perforation: comb 11½.
Printing: Photogravure.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 4 Russian kopek.
Quantity: 4,400,000.