Indeed. My "new" American Flyer #300 arrived today:
Dunno exactly what year this was made; guessing late '40's(?)
This is my first "300"; I took it apart, cleaned everything and installed a new set of brushes. Took a screwdriver, 1/4" wrench and about 45 minutes.
Runs beautifully; smooth (takes very little voltage, as it has no smoke unit) and very quiet (no "choo choo" effect). These old things never cease to impress me.
Mark in Oregon
PS: I see I've got to adjust that valve gear! EDIT: Done!