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These appear to be very small though. the one I saw a picture of was about ten or eleven inches around.
originally posted by: MerkabaMeditation
Unbeknownst to many, archeologists have dug up mechanical looking marine propellers made back ancient times when such technological things should not have existed.
The first early developments of marine propellers where Archimedes about 200 AD and the Chineese in 300 CE, in the dark ages marine propellers were forgotten and then reinvented in the 18th century.
Archeologists name these discoveries "Propellers" but claim they were used as currency rather than them being actual propellers.
Here are some briefs found online for your visual consumption. Bon apetite !...
Celtic propeller 500-200 BC Source
Celtic bronze propeller 600-200 BC Source
Celtic bronze propeller S ource
These are just a couple of example, there are many more pictures online. Could these be actual mechanical propellers - even traces of long since forgotten technology?