Half deflated GK slick on an English wheel:







Or on a smaller scale for tighter radius, rounded upper die into a skateboard wheel on the bead roller... as seen in this D5 oil pan repair...












The lower crease into a vertical flange can be done on a tipping wheel/die or manually by a number of methods...


























The gradual shape can be added by using an English wheel as a fulcrum/anvil approach, keeping a gap between the wheels and adjusting fulcrum pressure applied as needed