yes they are genuine i know of the guy who is auctioning them he is called greggor gee and is a Scottish comedian who ownes the only authorised replica chitty chitty bang bang and you can hire it out
www.chittycar.com also he has another bissnes called
http://www.tvandfilmprops.com/ and its that side of the bissness what has had the meat loaf shirt pants and candle sticks holders