1967 Sox and Martin coupe barracuda car pics

I see what your saying however I believe I have seen numbers on other cars that would indicate 10's of thousands of cars were produced in one day ?
Can you tell me where this is documented.
I may be wrong but my understanding of the definition of the words from the books I read as body production sequence numbers is specific to the number of bodies of that model being produced. That way they could track the amount produced and to have better quality control.
Just trying to get clarity
Thanks