The movie Saxon is a model 14 Saxon roadster. This model Saxon was introduced in Sept. 1915 and was built for one year. About one third of the years' 10,000 production was in 1915, the other two thirds were built in 1916.
I own two 1915 model 14 Saxons. Elliott

Thanks, I updated the info and I'll copy your comment on the vehicle page (it would have been better to post it there directly )