1983 Eldorado is it a Biarritz
 

Hello everyone thanks for taking my question. So we recently came into possession of a 1983 Eldorado convertible. Now the person that sold it told us it was Biarritz but I'm really not sure how to identify if it is indeed Biarritz. It has the correct interior seating and carpeting from what I can gather, but with it being the soft top it doesnt have the opera lens or the stamp. I have the original purchase order and it just says eldorado but then gives the convertible as a purchased option and also the wire wheels and the interior. So is this truly a biarrtz or did the original owner purchase some options to make it look like one? I appreciate any help in this I will post the purchase order, I also have the original build sheet of that helps. Thanks
https://cimg4.ibsrv.net/gimg/www.cad...6c23259590.jpg