http://tinyurl.com/y8kd7re

Maybe they use this kind of enclosure for the remote cameras. This
item in the ad is found in this document:
http://www.darkcadtec.com/USAF.pdf

I also found a government auction website that had sold some of these,
so it must be or was a common camera enclosure.

The ebay ad looks like it is missing the pyrex cover that goes in the
front of the enclosure. I'd sure hate to be the person that spends
close to $50 on freight to find that out.