Bill,

What era are the photos?

I photographed some NYC 'USRA' survivors in company service in the early 1980s at Selkirk Yard, and built a Westerfield kit using those photos and some builders photos as a guide.  My photos are in storage, but the model is here and has the cylinder on one side with the AB valve near it on the same side, and the reservoir on the opposite side.  I might have gotten it wrong, but I'm pretty careful about that stuff.

Todd Sullivan
Liverpool, NY