Mike:

Yes, this answers the question, and raises a couple more.  The last two are well-known, but I don't know what the first two looked like.  My reference to the National B-1 was in error, from a different series of Erie cars that I saw on rr-fallenflags.

Here's the one that's the most relevant:    http://rr-fallenflags.org/el/frt/erie82051jpC.jpg

I have a few trucks that look like this, including the one that was in a lot of the Branchline kits (similar to the Barber), so I'll go with this one.

Ron Merrick