Mt. Illimani, stamp on stamp, (issued 1978).
The illustration of the souvenirsheet shows Sonja Henie (Norway).
The other stamp on stamp shows a stamp issued 1972 "Adoration of Pachamama".
It is a painting of Arturo Borda (1883 - 1953). Pachamama is a goddess revered by the indigenous people of the Andes.