Ok this has been great. My stations generally conform to all the above with perhaps a few odd small details.
1. My No 90 Hyde Park has the red embossed roof from 1929 and a grey base and the 1924 "new" lithography. It also has the name "Hyde Park Station" printed under the clock on the ends.
2. My No 93 Freight Station has a smooth green roof and unlike the end picture on NWL's 93 with a yellow roof mine is imprinted "No 93" on the end in black letters directly under the name..."Flyer Town Depot" in white letters on a red background. Mine also has "Made in U.S.A." printed in black under the window.
You guys also didn't mention one of the coolest details on the No 93, if you look at the address on the wooden crate sitting on the baggage cart on the platform the address is..."American Flyer Manufacturing Company, Chicago, Ill" (I had to use a magnifying glass but it is quite clear once magnified).
In addition, the platform of my No 93 appears as grey not black and it has two seemingly factory punched holes equally spaced on each side of the front platform about 1/2 way between the front wall and the platform edge. I say factory punched because these are perfectly formed holes and appear to be precisely spaced. Note holes in the picture below.
Here is the end view of my No 93, note that the number is clearly lithographed under the name of the station as well as "Made in U.S.A." which is printed under the window. This number and country of manufacture does not appear in the NWL picture of the end of his station with the yellow roof. Hence if the Yellow Roof is the earlier vintage, then the number and country of manufacture must have been added when Flyer went to the smooth green roof.
3. My 234 looks just like the one in NWL post above EXCEPT - it has a red embossed roof and a grey base. The end sign is identical and the house is the one with the door, not the later "all window" house. Mine is also illuminated with one bulb under the extended roof.
Here is my No 234 with a Grey Base and support and Red embossed roof. It also has the earlier house, with a lithographed door.
End view which is identical to the one in NWL's photo (absent the green paint splash 
) but it shows the grey base.
Thanks guys, this has allowed me to finally date these little guys.
Don McErlean
