I have this postcard, and interpret the date as 27 August 1940. In August 1940 the Germans were still leaving the Jews pretty much alone, so this is why the card is asking us to return to Antwerp.
Hijman Natkiel and Esther Wijnschenk had three children that survived the war. Addition of a visitor of the website
In addition, a Jokos file (number 3861) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for :