Light flak mounted on German rail car. Exterior appears to be cement but there is an interior wall (metal ?).
http://cgi.ebay.com/ws/eBayISAPI.dll...m=280104837467
http://cgi.ebay.com/ws/eBayISAPI.dll...m=280104837331
http://cgi.ebay.com/ws/eBayISAPI.dll...m=280104837013
Off topic. An unknown to me, photo of an American wearing a camouglage uniform in the ETO.
http://cgi.ebay.com/ws/eBayISAPI.dll...m=280104805835
Usual disclaimer,
Ed