Sorry Becky, My mistake. I corrected my original entry to 1933.
Maybe you should look into getting a job as a professional fact checker. 
Good Grief even the reprints of these catalog are pushing 50 years old. Hard to believe.
Have you checked out this website? Most of the AF prewar catalogs are there as well as many others.
[Catalogs]
@AmFlyerTom , thanks for giving the correct reference.
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Going to look at it right now! 
I have been using that website for years, it is an excellent library of catalogs. If we have anyone here who is tech savvy (more than I am), I recommend downloading a local copy of the site for your future reference. Sites like these have a way of disappearing as the years go by. Most recently the Legacy K-Line site went down.
Here is an example of Set #1201 from 1921,
I know that the set is shown in the 1921 Catalog/Pamphlet, but I don’t have a copy of it to show, although you can find it on the catalog site that I linked to above.
The Motor 1201 does not usually come with a working headlight, however this set has the Motor 1201 with a factory installed sheet metal headlight, which is a known variation.
1200 Express Baggage
1201 Pullman Coach
Fantastic condition for a 104 year old toy.
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Here is a great American Flyer Accessory
Switch Tower House Model 108
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Now, the monster with the green eyes of envy rears its ugly head. Beautiful!
Is it OK to show some additional trackside accessories or might I provoke an attack from Greeneyedzilla?
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Only if you’re the one who outbid me on eBay for the one in the middle
I hope I wasn’t. I won it back in 2017. The red/green combination shows up occasionally. Be patient.
If one with a red pole and a green base ever shows up I might have to arm wrestle you for it.
Northwoods Flyer
I promise not to attack, but the green eyes are lit up! 
I like the trackside accessories that American Flyer produced.
This is the 2218 Automatic Block signal.
What is amazing is that even in some simple accessories they made variations.
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Makes you wonder about their workforce, doesn’t it? Somebody once made a crack about Lionel’s Italian workers taking a little too much wine at lunch and thus producing the odd variation. If this explains it, it would seem Old Man Coleman must have supplied his crew with kegs of beer every day!.
Actually I don’t think these variations are factory errors, nor are they the result of Italians with hangovers.
On the red signal the heads are not interchangeable, they are two different pieces designed to face the way they do.
I think the base placement may be a nod to the fact that the signal fits better between parallel tracks.
There are other examples.
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Greg Turinetti
Well, they were in Chicago. Maybe the unusual placement of the signal head to the right of the mast was a nod to the “left-handed” Chicago and Northwestern? Call me old fashioned but I like the one with the ladder on the rear of the mast (in the more conventional style) the best. But in reality I wouldn’t let ladder or signal head placement stop me from buying any of the other 3! 
PS: if Sam shows up at the same time as one or all of these semaphores all bets are off! 
Love the pictures!
Yep! And his buddy Gabe! 
This is the #2206 Highway Flashing Signal cataloged 1936-1939
This is the variation with the blue light bulb housings.
And the variation with the standard mounted on the base the long ways.
All three variations
Enjoying the World’s Greatest Hobby
Northwoods Flyer
Carrying on with the theme of accessories and their variations, here are are some variations of the #233 Arc Light
From my observation the green variation is the most common.
Enjoying the World’s Greatest Hobby
Northwoods Flyer
What kind of bulbs do those take?
