This artifact published on eBay [link] is advertised as an extremely rare authentic ancient Roman bronze prosthetic hand dated 0-400 AD. It is described to contain a fabulous multipurpose style with three fingers (each "very different" from the other), a twisted engraved design and beautiful dark green patina. It is described to be "in excellent condition". Apparently it is just 40mm in length and it is alleged to have been found in Europe. As the text says further, ancient soldiers would bury their valuable treasures before a big battle hoping to return later. The items they didn't bury were often lost on the battlefield. Unfortunately many soldiers were slaughtered, but they left behind many treasures for modern man to find.
Looking at the items, I wondered whether they could have been some kitchen utensil (stirring a soup with that could have been effective) or an instrument for gutting an animal (at that time, one would personally go hunt rather than buy meat from another person), of simply something different altogether.
(C) copyright eBay / auctioneer
These really look funny, don't they. They have something of metal made tentacles, don't they. They may be historic prosthetic parts - but they sure look futuristic.