I saw you thread about the Search Light Wagons. Hope the following pictures may also interest you. The Auto-Chapelle in particular would be an very nice modelling subject.
Brückenwagen
Beobachtungswagen
Auto-Chapelle
All pictures have been found on the Belgian site: delcampe.net.
All the best
Peter.T
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"Siplicity is the ultimate sophistication" -Leonardo Da Vinci-