Another series of images from Jack Connors showing the CFD Turret Wagons that the shops built on the Chevy Scottsdale (C20) chassis. At one point there was one of these assigned to each of the six districts.
More information on the history of CFD 6-7-4 in in an article HERE.
More on 6-7-6 is HERE.
The previous article in this series can be viewed HERE.