David de Vries was an ice cream salesman. His wife, Selma de Vries-Wijngaard, sold the home-made ice cream in their own front garden while David went round selling it in the streets.
Addition of a visitor of the website.
In addition, a Jokos file (number 18511) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.