According to the official death certificate issued by the City of Haarlem on the 5th of September 1946, Abraham Jacob de Vries died in the beginning of March 1942 at Sakrau.
According to the Dutch Red Cross he was deported from Westerbork to Auschwitz on the 28th of August 1942 and died on 31th of Augustus right after arrival in Auschwitzh.
This means that the date of death stated here is doubtfull.
Source: Noord-Hollands Archief, Nederlands Rode Kruis
Biography