Yes, after a little more research in my Burns green anorak, I can say that this is not the guitar used in the film.
The bass in the picture above has its toast rack aslant over the strings. I'm not sure when production switched to that form but the Burns Legend reissues certainly had it that way. The early versions of the Burns Shads bass had the toast rack crossing the strings at right angles. John's white bass was made like that and, from the
Finders Keepers clip below, the green one was too.
(So, in the interests of authenticity, was my Rostill reissue.)