Old Stamps Part I cont. .... more Bolivia

The second issue pictured on that page is the six-stamp issue commemorating the 100th Anniversary of the Bolivian National Anthem. According to wikipedia the hymn wasn't officially adopted until 1951 ... so I don't know why they issued commemorative stamps in 1946. Stampworld info here.

The national anthem of Bolivia (Himno Nacional de Bolivia), also known as Bolivianos, el Hado Propicio (Bolivians, a most Favorable Destiny) was adopted in 1851. José Ignacio de Sanjinés, a signer of both the Bolivian Declaration of Independence and the first Bolivian Constitution, wrote the lyrics. The music was composed by an Italian, Leopoldo Benedetto Vincenti.

Again the stamp appears to be a combination of engraving and photolithograph. The musical score and images in the middle of the stamp appear to be engraved.