Hi All
I have done a scan from my 1940 Car Builders Cyclopedia, the drawing is showing a caboose belonging to the Union railroad. The drawing also shows the brake arrangement going to the brake wheels on each end of the caboose. The brake set up is for AB brakes, used on that model of the caboose. The scans I made turned better than what I could find on the web. Hopefully, the scans will answer any questions dealing with the post.you will also see in the drawing the brake pressure gauge in the drawing.Pat Fahey Milford, Mass