I have recently found an “old Lionel” train, my question is how do I go about finding out the age and era that this train was produced? The only info I can find on the box is Outfit no. 352 for Lionel Standard track.
Try asking on the “Classic Toy Train” forum-next to this one. You’ll have much better luck.
I agree and failing that you might try the Lionel Collectors Club.
Don’t have the URL handy but it’s easily found with the various search engines, just enter LCCA.