GenLias has the marriage record for Dina & Gerrit
Huw 24-10-1923 Amsterdam #reg.2G;fol.39: Gerrit van der Velde 29 jaar g. Amsterdam, beroep Horlogenmaker (Isaac van der Velde, beroep Winkelier en Johanna van Emden) en Dina Glaser 20 jaar g. Nijmegen (Aron Glaser en Jeannette Alida Cohen)
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a watchshop, address: Slingerbeekstraat 29 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives