Some postcards which Maximiliaan Walther Sachs and Gertrud Bernstein have sent to former neighbours in the Wodanstraat in Amsterdam are preserved. Their daughter Gerda Scharlach-Sachs lived with her family also in the Wodanstraat.
Joods Historisch Museum. Documentenverzameling invnr. 3330
In addition, a Jokos file (number 54498) on this household 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 valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 10373/1517).