NG Fairmont ID Help Please

These photo were taken by the late Ron Harr in 1965 at Haines, Oregon at a privately owned museum that was liquidated many years ago. These motor cars and work flats were former SVRy equipment. I have some roster info on the SVRy motor cars, but am too ignorant to match up models. The roster goes through car #21 which was the newest purchased 1939 and retired 1947. It was shown as Fairmont S2 series E with QBC engine. I can provide similar info on many of the later ones, so if anyone can identify these models I may be able to match them to a # in the roster.
The story that I have heard is that this equipment shown was sold to someone in Nevada. It is certainly a curiosity where they went and if they still exist in someone's collection.