I must be looking at some odd American Flyer S scale stock then. It all
looks like new stuff, but the size of the cars doesn't seem much different
than the Lionel Standard O cars.
Or, as some have suggested, the Lionel stuff varies so much that it can be
hard to tell.
Forget the 'scale', and concentrate on the gauge. Pre war, AF used 0
gauge, same as Lionel, Marx etc. Post war, Flyer used S gauge. The
answer to your question is therefore YES if the item is pre war, or NO
if it is post war.
Compatible - the wheels may be, but not the couplers :-)
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