According to the "Sterbebücher" (death records) of Auschwitz, Simon Gomperts was murdered there on 9 October 1942. This date is different from the official date of death of 21 September 1942, as determined by the Dutch Ministry of Justice after the war. For the time being, the website joodsmonument.nl, list only the dates of death, as published at the time in the "Staatscourant" by the Ministry of Justice.
Addition