In 1966, Winkler became a candidate to join the Association of Plastic Artists, now under the artistic pseudonym A. R. Penck. which was chosen after the geologist Albrecht Penck.
En 1966, Winkler presentou a súa candidatura á Asociación de Artistas Plásticos, agora co pseudónimo artístico de A. R. Penck, elixido a partir do nome do xeólogo Albrecht Penck.