ATHEARN INC Yellow RIO GRANDE  Model Electric HO Train Locomotive With 2 matching Cars.  I believe 1 car is original and 1 is a later model.  Note slight difference in yellow color.  All 3 of these are Athearn Model trains with the same metal pieces and parts.

This may be the Rio Grande DRGW F3A / F3B HO Set. 

1 of the bottom track wheels is missing.  The Locomotive track wheels needs new rubber caps.  Unsure if electric works as unable to test but paint looks great.  Make a good offer and I will sell.

Black Locomotive is plastic and included in this set.