Mongolia
Exist Imperforate. Also with overprint 'Stamp World London '90' and Great Britain 1.
| Country: | Mongolia |
| Type: | Postal blocks |
| Series: | Stamp World London ’90 |
| Nominal: | 7 ₮ |
| Year: | 1990 |
| Size: | 116 x 143 mm |
| Perforation: | comb 13¾ x 14 |
Stamp World London ’90
 Stamp World London '90 |  Big Ben Tower |