Hi Bill,
At that stage, when a car changed départments, it’s registration number changed to reflect the new département so it could have started out anywhere.
Now, when a car changes hands or département, it has to be re-registered with one of the new style plates. I don’t know if this applies to Véhicules de Collection.
If you could find a fonctionnaire in Deux-Sèvres, who was interested, I expect that the information is “in the system”. Napoleon decreed that everything had to be recorded. However that would require him/her to be interested enough to work outside their job definition and that is unlikely (unless you can find one who is a tractioniste).
Bonne chance
Roger