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but a very few NP 40’ AAR box cars were rebuilt with
straight channel side sills starting mid 1950s and
continuing until early mid 1960s.
cars were rebuilt over approximately 10 years they received
different paint schemes. Many were repainted into later
schemes. In 1964-5 some cars were renumbered. If you have a
specific modeling date can give you a run down.
post war AAR box cars received the straight channel side
sill except for the last two orders which were built with
the straight channel side sill. The cars built with them
had the channel extend from end of car to end of car. The
rebuilt cars had the channel extend from bolster to bolster.
Did all these '37 AAR cars get rebuilt with
straight channel side sills? If so, when?
There are at least two other photos on fallen-flags.org, but
this one shows the details best. When they were rebuilt, did
they all get this paint scheme? And, I believe other postwar
cars got the channel side sills also. I'd appreciate it if
someone could enumerate the number series that got this
treatment, and I can go from there. I've already done one
15000 car from an Intermountain model, but at the time I
missed the different door and the relocated door track.