that's a Campy derailleur more than a full bubble off plumb.
on day 3 of RAGBRAI on the way to Clear Lake Tony's non drive side crank fell off and the bolt was long gone and when he tried to give it a go with just one crank just that first one big crank with his right leg was enough to suck the derailleur into the wheel and end his day waiting for the sag wagon. the derailleur hanger needs more than a little tweak it needs to be replaced. but luckily Tony knows the Daltex guy.
if you're looking for a Campy non drive crank bolt in or around Clear Lake Iowa in late July it might be hard to find even with Amazon Prime