USSR
Stamp from Souvenir sheet - Mi:SU BL71.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | Historical buildings of Russia |
| Nominal: | 50 k |
| Year: | 1971 |
| Material: | Chalk surfaced |
| Perforation: | frame 11½ x 12 |
| Mintage: | 1,100,000 |
Historical buildings of Russia
 Pskov Kremlin 0.05$ |  Novgorod Kremlin 0.05$ |  Smolensk Fortress 0.05$ |  Kolomna Kremlin 0.14$ |
 Moscow Kremlin |