I am aware of the following examples of normal surfaces in $\mathbb P^3$ that are projectively isomorphic to their dual varieties: 0. the smooth quadric; 1. Kummer surfaces; 2. The surface with the equation `$x_0^3=x_1x_2x_3$` (in homogeneous coordinates). What else is known? The base field is algebraically closed of characteristic zero. Thank you in advance, Serge