Spanish Civil War – SIA stamps and aid stamps

Civil war. Three SIA (International Anti-Fascist Solidarity) stamps, Durruti’s 2nd Anniversary. 50 cents With image of Alcalá de Madrid gate. State preserves the rear tire. Five stamps, vignettes of “the Association of Friends of the Soviet Union” of 10 cts. With images from different places in the Soviet Union. Very good conservation and retain the rubber at the back.