Bulgaria
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Young Singers Challenge |
| Nominal: | 5 ст |
| Year: | 1967 |
| Perforation: | line 11½ x 11 |
| Mintage: | 120,000 |
Young Singers Challenge
 Scene from the Bulgarian Opera "The Masters of Boyara" |  Symbolic Representation of Opera Art 0.83$ |