How many of these 65 darts were made??
The key word is "scheduled " production date. The actual date can vary because of a quality control issue that held it up or sidelined it. A parts issue, availability. Many reasons.
The seller looks to really make this car seem to be important/valuable to go through this "research" on such a low dollar car.
Back then you could order about anything you wanted. Everything could be a "1 of 1" Now if it was a Hemi car...