This steampunk mouse definitely looks like a tank. It’s a Russian built tank/mouse and actually looks like the kind of steampunk tank that Russia might have constructed.
Having began life as a plain black mouse, it’s all brass and leather now. It even has little porthole type windows. The modder even went so far as to pimp the usb connection to match, which is a nice touch. I don’t think you could use it comfortably, but this thing is probably better turned into an RC steampunk tank anyhow.