Power door locks

Does anyone know what early mustang or Cougars had the optional power door locks?
Is there any way to tell if a particular car had them, was it on the Marti or part of a convenience group?

No power door locks in any 1967 to 1973 and maybe later. You will see on power window switches a switch marked “LOCK”. All this does is lock out the power windows so the remote switches do not work, keeping the kids in the back seat from playing with them.