thanks for the trained eye Za!
It does look a little manufactured, now that you mention it! It looks to me as though they all fired simultaneously as well, would this have been done in a true battle?

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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