Need help with my A57 69 cuda !!

Ok guys, as you know i purchased a 69 barracuda last week which i thought was an A57 car, i have no fender tag, and only part of the build sheet,
When i started talking to the guy about getting a fender tag made, he has infomed me that he thinks my car is cloned from a A53 car.
Reason being that everything we have found in our research leads to a conclusion that all A57 cars were made after December 13 or thereafter.
My car was built early in the first week of production , i am attaching a bulletin that we found on a website that is dated December 13th 68 to the dealers, that the A56 and A57 cudas were now available for production.
I am going to try and attach a copy of it on this thread.
If you have any info on this subject please get it to me ASAP.
Also i will be listing the car on ebay Monday.
Any help or comments are welcome and appriciated.
Blessings, Frank