I definitely believe the author is anonymous. It was created during de first days of the Spanish Civil War, by various artists members of the trade union CNT (art and drama area) or FIJL, and were posted in every city they could. The federation was very new and there is fairly no archives, information or media about it.
This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
Public domainPublic domainfalsefalse
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