Rolls Royce with tailfins. Named the "Honeymoon Express" OMG, even people with taste and expensive cars couldn't escape the tailfin epidemic of the 50s

the coachbuilder Freestone and Webb is to blame. They also converted a 4 door into a two door to build this for an enormous amount of luggage space and the convertible top

the headlights have a distinct mid 50s Ford design too

these are the 2 Rolls Royce that were made this way, F and W also built one Bentley this way. This blue one recently sold at auction in 2012 for 912k

http://www.escuderia.com/concorso-eleganza-villa-este-2016/
http://www.carbuildindex.com/55411/the-tail-finned-1958-rolls-royce-silver-cloud-i-honeymoon-express-by-freestone-webb-was-one-ever-sold-dirt-cheap/
http://www.conceptcarz.com/view/photo/1100586,18220/1958-Rolls-Royce-Silver-Cloud-I_photo.aspx
http://www.car-revs-daily.com/2015/03/17/1958-rolls-royce-silver-cloud-honeymoon-express/