Ambroise Paré’s designed this mechanical hand—which he named “Le Petit Lorrain” — in the 1550’s for a French Army captain. The thumb is stationary, but a mechanical lever operates the other fingers. This illustration is taken from a 1663 edition of his complete works. (source)
corvusfugit.com 
Wow. Pretty mind blowing
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I know. It’s a shame the actual hand hasn’t survived.
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