Several years ago, I developed this concept for a Victorian-era British colonel who had one of his arms replaced with a sophisticated metal prosthetic, making him a sort of steampunk cyborg. He was going to be a villain in one of my short stories set in Africa, and (as you might expect for a European imperialist bent on pillaging the Global South) he was not a nice guy. Unfortunately, I never got around to finishing the story, but I might get some mileage out of the character in the future nonetheless.