Comparing with these pics:
http://photoswest.org/cgi-bin/imager?00007528
http://rgsrr.home.comcast.net/~rgsrr/picts/rgs/rgs20.jpg
RGS 20 has its center cab windows above the height of the cab front doors; 375 does not.
Also, 375's tender (coal load portion--does it have a name?) is rounded, while 20's is square.
In the picture, the engine behind has high cab center windows and a square tender. The tender also has a railing behind the coal load that is identical to that of 20.
End of story?
Edited 1 time(s). Last edit at 09/18/2008 09:19AM by Robbie.