Willem Jacobs was deported on the 16th of October 1942 to Auschwitz.
The official day of death as established after the war by the Department of Justice is the 4 of December 1942 (City of Utrecht, certificate of death 838).
Source: Dutch Red Cross
In addition, a Jokos file (number 52300) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.