1933 Orval Abbey semi-postal stamp was issued on October 15, 1933. These stamps are very special due to the fact that they were released at the height of the Great Depression. The uniqueness of this issue is that it has tremendously high denomination (10.00F. + 40.00F). It features Madonna and Arms of Seven Abbeys. The pane of twelve 1933 Orval Abbey semi-postal stamps were sold for $26,868 by David Feldman on December 14, 2012.