@Fatman- Thank you so much for your information and confirmation that my little clockwork steam set is HWN. I also agree that the time period is likely to be the 50's and 60's and the "postwar prosperity" time period. Your variation with HWN on the tender now gives me something else to look for. @StevefromPA- told me about the fact that for some of the passenger cars, the coach body can be detached making it a flatcar and HWN even produced other bodies that could be attached to make a boxcar. Mine has some sort of release lever but it seems frozen at this point and I need to lube it (or hit it with some "Liquid Wrench") so I don't break it when I try and move it. The clockwork motor seems to be ok but the brake lever is "frozen" at this point and I don't have a key, so messing with that is a future activity.
Beautiful Bing/Bub cars by the way. Like @palallin- I would vote for the extreme right front and back to be 1 gauge but the one that seems to be marked with an "11" (or is that 2nd class) would be another possibility.
Best wishes and Happy New Year
Don
