How do you tell if a 1971 Mustang is a Mach 1?

How do you tell if a 1971 Mustang is a Mach 1?
Some of the standard features on the 1971 Ford Mustang Mach 1 model included:

“SportsRoof” body style and “63R” body code on the door tag.
Base Mustang vinyl interior.
Argent or black “Mach-1 MUSTANG” decals on the fenders.
Argent or black stripes and a “Mach 1” decal on the trunklid.
Argent or black lower body accent paint.

Some of the standard features on the 1971 Ford Mustang Mach 1 model included:
  1. “SportsRoof” body style and “63R” body code on the door tag.
  2. Base Mustang vinyl interior.
  3. Argent or black “Mach-1 MUSTANG” decals on the fenders.
  4. Argent or black stripes and a “Mach 1” decal on the trunklid.
  5. Argent or black lower body accent paint.