When one hears the word Demonstrators for Railroads, Immediately one thinks of the colorful diesels. However, what about steamers? Granted they may or may not have been colorful but the Steam Loco Mfg's must have done some demonstrator models.
So far for O gauge there is less than a handful of models that have been produced:
K-line/ Lionel 2-8-4 Lima #1
Timken 4 aces ***[Due March 2015]
My question is are there other steam demonstrators THAT also made it as a railroad working class locomotive?