Take notice that the near most reefer on the right (upon which the photographer is standing) has the reporting mark stenciled on the roof, which I think is a Santa Fe thing. Also, for dating purposes, one of the PFE reefers in the distance has the location of the UP and SP heralds reversed, which was done after the plug door cars arrived, but I don't recall the year... In fact, it is a plug door car.

Dennis Storzek