Hello Armando,
This car is clearly a new "recreation" of the 'Mary Stuart' Tail RSR. The second picture is even more convincing as the car runs on low profile tyres which did not exist in the seventies and it does have two exhaust exits (like some tuned 911 SC 's or Carrera's at the end of the eighties, beginning nineties).
This car is definitly a replica.
Kind regards,
JD