Here is a link to a Shorpy post showing the ends of two boxcars taken in
Washington, D.C., in 1925.
Click on the photo to enlarge it.
The detail is quite good…so good one can distinguish the paint deterioration around the area of the brake platform from the boots of brakemen.
Cab I assume the stenciled “B” on the car to the right stands for “B’ end of the car?