Gottfried von Berlichingen: Götz of the Iron Hand(1480 – 1562)
A German imperial knight and mercenary, von Berlichingen lost his right hand in battle when enemy cannon fire drove his sword against him. Reluctant to accept this limitation, he had a mechanical prosthesis made to replace the crucial appendage.
Using an ingenious system of racheted digits (mechanisms pictured), the famous iron hand for which he was known was able to handle shields, reins and pens with relative grace; von Berlichingen continued in an illustrious military career which has inspired plays and lent his name to warships after the end of his long life.
I’ve got a sneaking suspicion this is what Guts’ prosthetic arm in ‘Berserk’ was based on