Couple of quick standard gauge things:
The model destroyed in "Back to the Furture 3" that was actually destroyed was a 15" gauge model.
Yes, Sierra #3 is an 1891 4-6-0 Rogers Locomotive Works product.
You really can't see her right now...well actually you can if you look around for all her parts. As of Wed October 25, 2000 she has begun a year long (or slightly more) near frame-up restoration. She'll be quite the lovely lady when finished!
Thank you,
And now back to our regularly scheduled gauge...