1956 Sc 1747B BL 21 New building of the Moscow University on Lenin Hills Scott 1787a

1956. New building of the Moscow University on Lenin Hills.
Catalog numbers: Scott 1787a, Standard Collection 1747B BL 21, Mi BL 20, Yt BF17.
Issued on: February 13, 1956.
Perforation: frame 12½ x 12.
Printing: Offset lithography.
Colors: Multicolor.
Face value: 4*1 ₽.
Quantity: 200,000.