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.
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