If real T5 cannot show the word Mustang anywhere on the car, only running horse on grille and gas cap. My 71 Convertible spent 29 years of its life in Germany but my car is NOT A T5 ! My car was registered in England for a few years (before 1980), how and when it got there remains a mystery since there are no known US owners but I do have the name and address of the owner at the time in England! My Convertible was shipped back to US in 2009, sitting in my in-laws garage since 1997 not being driven at all!!
Oh it is real here is the Marti report and it plainly lists T-5 package. The owner was an US Army sergeant stationed in Germany. The military would ship your car home for $1.00 so he brought it back with him. It is pouring rain I have posted in the past the door sticker which also states "For Export Only" and DSO of 90 if I remember correct. It is in the T-5 register.
The owner was racing a camaro and went off road and hit a pole on the left front corner. Due to the costs it has never been worth the work to fix it. Rare does not always mean valuable.
See Marti attached.