Bulgaria
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Spring |
| Nominal: | 13 ст |
| Year: | 1971 |
| Perforation: | comb 12 x 13¼ |
| Mintage: | 270,000 |
Spring
 Flowers 1$ |  Sun |  Flowers and Birds 0.07$ |  Flowers and Bird 0.08$ |
 Flowers, Birds and the Sun 0.16$ |  Flowers |  Martenitzas 0.06$ |  Player of drum 0.04$ |
 Birds 0.05$ |  Lazarka dancers 0.13$ |  Flowers |  Piper 1.1$ |