Hey Jack!
Just caught up with all your posts! Again, thanks for sharing all this with us! Very interesting! Keep it up Lefty, I want to hear more about your father as well!

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This is a pair of Dutch resistance crystal radios, built into a small metal can, and a matchbox. The image is from a postcard bought at a Dutch Resistance Museum in Amsterdam. The matchbox is marked in Swedish, but Swedish matches were sold in Holland for many years..
Scott