Really? Wow. My eyes must be deceiving me. The head tube in the auction pics looks so much shorter to me.
I'd like to see a pic of the bottom of that hanger. Does it look like it's been tapped out to anyone else?
And if so, which derailleur with a threaded mounting bolt would work on it without a stop ground into the bottom of the
hanger? A simplex with integral stop plate? Then again, maybe it has been ground.