Order Type is "RETAIL", per Kevin Marti; Retail ? an individual comes to a dealership and orders an as yet unbuilt vehicle.
Yes likely it was common place in those days to order a car to be built for you and not purchase one off the lot. At least my family and people we knew did it all the time. Was kind of exciting to wait and go down to meet the cars when they came in. I last did this for the family car in the 90's. Wanted a wagon for the family with all the performance options and without all the power windows and the like.
Kevin also mentions "Under Paint or Tire" on the DSO line.
Wonder if there are 'other' "Under .. _____" item specific things, that Kevin has identified.
Yes that line confused me since we know that it was used for more than just paint and tire choices. Had the first special order car from 71 DSO in 65 production. never figured out what the non- regular production item or items that were ordered on the car. Was a regular blue six cylinder automatic car. Figured the dealer ordered something special on it in order to move in front of other dealers to get one of the very first fastbacks San Jose built
This could just be one guy, that wanted a different color painted, on his very low optioned Mustang Sport Roof.
Yes believe this is what the OP found. Had a 70 convertible that was that way. Purchased it from the original owner in Berkley, It was the third Mustang convertible she had purchased from the same dealership so they had a buyer they knew they needed to take car of her. Se disliked all of the factory colors so she choose another and she also didn't like the "fake" wire hubcaps so they took care of both issues and both were called out on the window sticker. Always wished I had kept that car - it was the wife's club/show car at the time but had to sell it to buy her next car that would replace it.
Like a 69 Special order Mach I I had the chrome remote control mirror replaced the painted racing mirrors. Shown below
Also below shows the DSO for the order. 728217