All of us have already seen the regular Ferrari SF16-C, but some of you have also seen the blacked out version below. What is it? The designer/modeller I know that worked on the project wrote this to me (letter-to-letter copy/paste): "That was one of are frist prototype. It will not have that combo in color."
Basically it was one of the first prototypes sent out to the Ferrari team to use. There were previous, hand-made prototypes of course, but these ones were the first to go out to the athletes.