Designer: S. Belyaev
Paper: coated
Printing process: offset
Perforation: 11 1/2 x 11 3/4
Size of the stamp: 26 x 58 mm
Sheet composition: 8 blocks
Printing run: 1.000.000
Michel catalogue numbers: 161-163
20000 (K) multicoloured. Medieval astronomic devices,
edition (1542y.) of book N. Kopernik "Trigonometry" from
observatory's museum
30000 (K) multicoloured. Astronomic mirror telescope
ADzT-8
50000 (K) multicoloured. First building of observatory
(built in 1845y. by architect Beretti)