Not mine, but very interesting and could be a good starting point for a mild expo vehicle like for those who start with an ambulance. Have never really seen anything like it, maybe used for geological purposes?
http://www.ebay.com/itm/222140530260?forcerRptr=true&item=222140530260&viewitem=
http://www.ebay.com/itm/222140530260?forcerRptr=true&item=222140530260&viewitem=