1956 Cadillac Eldorado Broughham Motorama concept.

This one-of-a-kind 1956 Eldorado Brougham Town Car is one of the rarest concept cars. Known as XP-48 it was featured in the General Motors 1956 Motorama 'Highway of Tomorrow' and later that year was featured in the Paris, France Auto Show.

It is made of fiberglass and stands 1.41m tall with a 3.29m wheelbase. The rear compartment is done in beige leather with all appointments in gold. The chauffeurs' area is done in black Moroccan leather.

Initial plans called for the Eldorado Brougham, which used a different body than the rest of the Cadillac line, to go into limited production in 1956. It would take another year to come about, so instead another Brougham dream car made the show circuit, the Town Car. Unlike the 1955 Eldorado Brougham and the 1957 production car, it used fiberglass body construction. It featured an open compartment in black Moroccan leather for the driver and enclosed beige themed passenger abode.

Among the features awaiting the driven were radio-telephone, air conditioning controls, women's vanity, cigar humidor, thermos bottle and glassware.

An electronic locking system both secured the doors when the vehicle was in motion and opened the center-opening doors when needed.

It was ordered destroyed but the salvage yard owner could not bring himself to destroy the car and covered it with a tarp where it remained until 1989.