thats in fitzsimmons book its called a foul pivot blow according to him, much diffrent then a corckscrew punch. http://books.google.com/books?pg=PA...YBeua_xEIC&ots=JLDL14Fgxh#v=onepage&q&f=false page 126
I think you might be correct on that, but i was sure I heard it described as the corkscrew punch somewhere.