October 30, 1956. They tested the car at the Chelsea Proving Grounds.
November 3-7, 1956. They tested the car again.
By October 31st, the date of the memo, only three
Cs had been built; the car in the picture had to be
one of these three. Car #1 was a convertible.
Car #2 was a white coupe with power steering, heater and radio.
Car #3 was a desert beige coupe with radio and heater but without power steering.
A radio antenna is visible in the picture -- could be car #2 or #3. If you enlarge the
picture, the color of the car appears to be more desert beige than white, so I lean
toward car #3. More, you would not want power steering if you wanted
maximum speed, so it is a safe bet this was car #3.