It was noted in the comments section of my previous post that the sketch of an upraised fist resembled a "Power to the People" symbol. Actually, however, that drawing was abstracted from this one:
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This drawing, in turn, was my interpretation of a detail from the photograph below (or one very similar to it):
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This drawing, in turn, was my interpretation of a detail from the photograph below (or one very similar to it):
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