Spanish copy of the German Stoltzenberg Vollblickmaske (full-face mask), equipped with an Italian P.C.40 filter.
Hugo Gustav Adolf Stoltzenberg was kind of a monster. The following is from his Wikipedia page:
In the 1920′s, Stoltzenberg built a close relationship with the Spanish government. He signed a contract to fully assist the establishment of the La Marañosa plant "Fábrica Nacional de Productos Químicos" (National factory of chemical products) which served the Spanish army with chemical warfare agents (including mustard gas bombs) used against the Riffian rebels in Spanish Morocco during the Third Rif War between 1923 and 1927. He later became a Spanish citizen while being the chief engineer of the plant.















