I am puzzled about the external evidence of fans on reefers. I some caes they seem to appear on only one side, but this is unclear since we rarely have photos of both sides. Then again early SFRD cars had the external mechanisms on boths ends of the side. I even have the Overland parts to use on an InterMountain kit. Did the external eveidence vary from system to system or perhaps over time?
Mechanical fans were located at both ends of the car but the drive ends were visible from only one side. On some early Santa Fe cars, both drive ends were visible from the same side of the car, but in most cases only the drive end at the left end of the side was visible.
