I was initially inclined to believe it was a lightweight 2A as well, based solely on the fenders. But after looking at it I realized there were too many inconsistencies with that idea. The hood appears to be that of a Series I, as does the rear fender cut out, What was throwing me off was the placement of the headlights - more of a Series 2 configuration. Easier to modify the lights than the hood and rear cargo area, so I’ve decided it is indeed a Series I. I’ve already figured out how to modify the Tamiya SAS Land Rover to make a reasonably accurate replica.
And as Frenchy’s posts point out, it is indeed from a film, so who knows how accurate it was? That said they did use period correct (1961) Series I (unmodified) and Series II vehicles, so they were at least trying to be historically accurate. The imdb site lists it as “unknown.”
However, this wasn’t used by the Irish, as Frenchy postulates, but rather by his countrymen, the French mercenaries who fought against them. I think they just removed the big, bulky fenders and attached or replicated those from a lightweight 2A.
Thanks for the replies. My version might see the light of day when we elect a new president. No, not in four days - the next president would be in four years. Yeah, I build that fast.