This will include Great Western and Chanticleer engines that were produced by Jacob Haish Manufacturing, Appleton engines, Sandwich engines and early Rock Island engines as they were re-badged Appleton engines.
All the above engines were, if I remember correctly, were designed by Jacob Haish. I MAY NOT BE 100 PERCENT CORRECT ON THAT STATEMENT.
The other note here is most Rock Island engines you see today were built by Alamo so, although welcome, may not be considered a "feature" engine.
And an interesting thing I was told, but have not yet confirmed, is Rock Island was bought out by Case. So there is some real loose connection to the expo.