The "Passieve Luchtbescherming" (P.L.B. Antwerpen) or "Passive Air Defence" of Antwerp used a variety of vehicles to come into action after a missile had struck.
This early Chevrolet C15 is one of them:
See more info and pictures here
http://www.bunkervliegtuigarcheo.com...fence-antwerp/ and here:
http://www.bunkervliegtuigarcheo.com...-antwerp-1945/