On the 1973 Geneva Auto Show, the first LP400 Countach prototype was shown, painted in a bright red and with a black suede interior. It showed the air intakes and the NACA ducts and had the 4.0-Liter engine installed, on the inside, the digital gauges were removed and the periscope rear view mirror was abandoned.
After the show closed, Bob Wallace used this car to perform various hard road and track tests. These tests led to a second LP400 Countach, which now used the tubular chassis. Driving lights were built into the front bumper, together with air intakes underneath it for the front brakes, and the installed windshield wiper was the same as on the actual production cars, while the first, red prototype used two wipers.
This dark green with brown upholstery Countach was shown to the public on the 1973 Paris Auto Show. This specific prototype was used to construct the 'Master model', a wooden construction that the panel beaters used to form the body panels on.
Source: lambocars.com