I recently posted about the AMT, Auburn, KMT and Kusan production of boxcars that later showed up under Kris (Andy Kriswalus) KMT production which started around 1968 in another thread, and received a nice post suggesting I write up something about those fine trains from the 40s and 50s that remain in some form of production to this day. Rather than add more info that diverts from the Kris KMT boxcar production thread, I looked up some old threads and posts I've made regarding the early AMT era production trains. Perhaps others with an interest in those trains can add to this thread and build up more knowledge about postwar Lionel's O gauge gadfly - AMT beat Lionel to the punch with both smooth-sided and corrugated passenger cars, a scale sized boxcar, and a RDC car, and their history is interesting.
A back-from-the-grave resurrection of an AMT NYC F unit:
https://ogrforum.com/...nit-flea-market-find
https://ogrforum.com/...3#164024807362268473
https://ogrforum.com/...93#80551019711641493
https://ogrforum.com/...11#63654680857017111
https://ogrforum.com/...34#80973530182115734
https://ogrforum.com/...1#144593603242624821
https://ogrforum.com/...61#48874849379164061
https://ogrforum.com/...80#74918006410825580