1973 Sc 4192 Millenary of Abu Reihan al Biruni Scott 4099

1973. Millenary of Abu Reihan al Biruni.
Catalogs: Scott 4099, Standard Collection 4192, Mi 4142, Yt 3951.
Condition: MNHOG.
Issued on: August 9, 1973.
Perforation: comb 12 x 12½.
Printing: Recess.
Size: 30 x 42 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 2,500,000.