TedW, if this is your introduction to the world of Tinplate, the first thing to wrap your head around is that your locomotive is most certainly not "Obviously in terrible shape". It is magnificent! It appears to be completely original, which is 98% of the tinplate game; and there seem to be no parts missing or even significantly damaged, which is the other 2%. For extra points, you even have the original winding key! And then the real clincher is that it is a family heirloom from your grandfather, which puts you and your loco in a very elite class. And 19th century! And in working condition! WOW! is right!
I do like the leaf-pattern red cow catcher, have never seen anything like it.
david