Thank you Larry, Dennis & Aaron.  I have a copy of Rick Leach's reprint of the 1940 NP freight car diagram book, but it's in storage about 1500 miles from here.  If someone else has a copy, that might help.  I'm pretty certain that the diagrams that Aaron provided would be in that reprint, but there may be more.  I am still amazed at how many diagrams it took to document NP's freight cars, especially the older ones.

Does anyone out there have a copy and can check it?

Todd Sullivan.