With the help of Jan Poortman and other finds on the web a lot more detail about the Erres Radiobouwdoos is shown. The userguide is scanned, many photos are present.

I have added a lot of information on the Erres radio kits, made by R. Stokvis van der Heem, the Netherlands.

A brochure, the userguide, more photos and a story written by Jan Poortman.