I bought a bunch of misc parts and trucks off dabay, and these are the more interesting trucks, but danged if I can ID them - if my searching time was worth only a dollar an hour I probably could have bought 'em new!
Exhibit C - has a very stout metal plate on top. The mounting arrangement appears similar to that used in the old 200 series ALCO's and 600 series NW2s, except for the obvious fact this truck has 6 wheels. The base plate and shoe assy, were attached, but honestly not sure if they belong. This base plate did not use the usual brass contact between the shoe rivet and the coupler, but rather a single wire.
Thanks for any help you can offer!