There is just no way to know that, sorry.
Hamtramck built other models, the very 1st VIN assigned each year ended 100001, but going up from there in 1971 some were Demons, some were Dusters, some were Barracudas & so on.
Also, the cars were not built sequetially by VIN. As an axample, 100001 may have actually been made right after 100032, or even on a different day.