There are photos of a Doncel car with french registration prior to the event where it was destroyed. I don't know how many events but I think more than one prior. Those Zoll plates that were on both cars were only supported to be there for 3 or 6 months - they were customs export plates that gave you (and still do) a limited time to drive in Europe and then the car is not registered. You, better than most of us will know the crazy situation on importing cars to Spain during that time. Some cars were registered where you are, some in Andorra, some in France, possibly some in Italy, and some remained on Zoll plates for much longer than was legal because of the restrictions on importing cars (and registering them) to Spain.
I suspect that by 1972 it may have been a bit hard to maintain the fiction that those two cars were not "Spanish", or still able to use Zoll plates, and the Doncel one was transferred to a friendly French registration and the other one, I think was sold to Lencina (although the photos I have seen still have the Zoll plates on it then)
here are some photos of it with that registration
I think that this first one was at the Firestone in March 1972. At that event I think he had start #4 (or at least that is what the EWRC site claims). I cant read a start number or event decal on the car but it is not the same as the livery when the car was crashed later in the year.
the next photo is of the same car but different livery again - see top of front fenders This time it clearly has start #1 but I don't know what of a half a dozen possible events it was- maybe someone else will know.
the next couple of photos are possibly from the same event as the start # is 1. Note the sponsorship is Sopral not Repsol as in the first photo. I believe that the next one is at
Critérium Rioja 1972 10. 6. – 11. 6. 1972 but am not sure if the last one is there or not.
the as you have posted at the Ciudad de Oviedo the car was wearing start #2 with Firestone sponsorship on the rallye plate rather than Pirelli on earlier ones
However the most confusing, to me part is this which was with the photo you loaded (below)
"
Photo uploaded by Ricardo Muñoz Llorca
Parc Fermé at the start of the 1972 City of Oviedo Rally. We see the Porsche 911 S 2.4 Egreteaud, number 2, owned by Eladio Doncel and Antonio Mantecón."
It explains the French plates BUT Was this jut a ruse to get around the Spanish rules and it really was 911 030 1149, which was destroyed at this rallye or was it a completely different car??
Doncel certainly had 1149 at the rally De La Lana in February 1972 (below car #2 1st )