UPDATE 11-06-2022
Ken lionel...NYSW boxcar, like all RMT cars, has a built date on carbody side...in this case 2017.
'own cabooses, s4, box cars, hoppers, beeps, ore cars etc'...all these items are older RMT production starting say in 2009.
NOTE: This topic is related to the RMT new tank cars...let's not get confusing or off topic.
Thanks.
Walter/RMT