Javier Reguera, from the Spanish cultural blog asi se fundo carnaby street kindly uploaded 71 scanned images of Spanish movie posters, from 1920 to 1957 at Flickr. I have a good surprise with them: the graphics, with strong colours, detach the actors or a symbolic image of the film, make it even more attractive. The 1920's and 1930's posters remind me the aesthetic of the vintage Soviet posters from the me age.

Javier wrote about the posts on the blog: evolucion del cartel de cine en españa, 1920-1957 (Evolution of movie posters in Spain). He talks about some interesting things about the transition of posters design, from 1920's to 1930's, when the illustration won the detach, in the place of the excess written information, popular in the early cinema. He also says that, in the 1930's the posters were turned into essential ways of commercialization, rejecting the artistic aesthetic tendencies.

If you are familiarized with the American posters of classic films, take a look on the Spanish versions and try to remember the known versions. Or compare the following examples with the original posters: Hitchcock's Dial M for Murder (original poster) , the Marx Brothers' A Night at the Opera (original poster), The Wizard of Oz (original poster), Charles Chaplin's The Kid (original poster), The Big Heat (original poster) and the German Fritz Lang's film Die Nibelungen: Kriemhilds Rache (Die Nibelungen: Kriemhild's Revenge) (original poster). Excluding the Hitchcock's film, the Spanish versions look more dramatic and prettier to me. (via La Ventana Indiscreta)