Bulgaria
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Flowers |
| Nominal: | 13 ст |
| Year: | 1966 |
| Size: | 30 x 40.5 mm |
| Perforation: | line 11 x 11½ |
| Mintage: | 300,000 |
Flowers
 Сhrysanthemum 0.04$ |  Hollyhock 0.04$ |  Columbine |  Tulip |
 Marigold |  Pansy 1.6$ |  Blanket flower |  Alpine Bellflower 0.06$ |
 Stemless gentian 0.07$ |  Wild crocus 0.05$ |  Iris sibirica 0.1$ |  Erythronium denscanis 0.1$ |