Apologies for the mediocre photo, but while on a trip in Spain, I spotted this thing on a rooftop that looks like a rather crude looking siren. I am positive that it isn't a chimney or anything like that since not only I could make out what appeared to be a chopper rotor with visible port holes, but the siren itself is mounted on a pedestal that is offset to the side with no tube under the base. If it is a siren after all, I speculate it dates back to the Spanish Civil War. I have no idea if it's active of course or if it's just a relic of the past. Curious to see if anyone could identify it though.
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