According to tradition Josef Hirsch Dinner was a very intelligent young man. A former boy-next-door remembers he played chess with him on ocassion and always lost. Addition of a visitor of the website
In addition, a Jokos file (number 31566) 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 valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 2669/7330).