Not fictitious at all. They have a few bird painted up like that at Randolph AFB. They look pretty cool when your used to seeing the dark grey/white camo all the time. They also have a few all grey birds that are very glossy.Number 7 in the bag! I found this scheme on a model company site....it was for a model of the T-38C that, at the time the page was published, had not been released yet. A possibly fictitious C model skin on an A model. Perfectly reasonable to me!
Again, not 100% accurate in every detail...but close enough to add some enjoyment to this bird. The price is right in any case.
OBIO