The scroll was probably inscribed in sta'm k'tav ashuri as most of them are. I heard about a really old piece of scroll allegedly written in k'tav ivri about thirty five years ago in the collection of a man in London, England. Turned out to be a false alarm though - the guy had been fed a bunch of nonsense and sure wasn't an aramaic or hebrew script expert; just a wealthy collector who thought he'd tumbled onto a real find. I got a couple of shots anyway, but it turned out to have been scripted the year before. Waste of time.
The most interesting thing about the Torah you're going to photograph, specifically if it originated as a real Sephardic scroll created ~400 years ago in or around the Iberian peninsula or the adjacent continental sub-region, is that while they all have the exact same number of letters and the correct number of column rows, etc., etc., some of the soferim back in the day managed to get in some slight modifications to the k'tav ashuri which were acceptable to whomever commissioned the Torah. If it turns out that you're photographing one of those, there may be a number of the Jewish historical archivists, historians and whatnot who'd also be interested in your photos.