Photography agency of ing. J. van Dijk.
Jan van Dijk (1882–1960) was a Dutch photographer who styled his name with the title ing. (ingenieur), which is used by polytechnic-educated engineers. According to his family, he was the primary photographer of the agency he founded, but his son Johan van Dijk may also have taken some of the photos.
Historical photos by Fotobureau ing. J. van Dijk: