Cold War pinhole camera

Watch from about 6:00min:

https://www.youtube.com/watch?v=uLFHZVX2wpE


The device on top of that bunker is a "Ground Zero Indicator":

http://en.wikipedia.org/wiki/Ground_Zero_Indicator


Actually it is more a kind of rangefinder than a camera in the pictorial meaning, but nevertheless basically it is a pinhole camera.

The sun burned a distinctive suntrail across the papers when there was no cloud cover.

Click to expand...

I wonder if these were the first pinhole solargraphs?