Mongolia
| Country: | Mongolia |
| Type: | Postage stamps |
| Series: | Butterflies and Flowers of Mongolia (overprinted EXPO `90) |
| Nominal: | 25 Mongolian möngö |
| Year: | 1991 |
| Size: | 26 x 36 mm |
| Perforation: | comb 14¾ x 14½ |
Butterflies and Flowers of Mongolia (overprinted EXPO `90)
 Orange Tip (Zegris fausti) |  Flower |  Regal Apollo (Parnassius charltonius) |  Purple Tiger (Rhyparia purpurata) |
 Moth (Karanasa regeli) |  Large Salmon Arab (Colotis fausta) |  Flower |  Flower |
 Flower |  Flower |  Butterflies |