Re: Square corner boxcar group build
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Guy, thanks for that information. I seem to recall reading about that somewhere but I couldn't remember when it went into effect.
On Monday, July 19, 2021, 03:06:53 PM EDT, Guy Wilber via groups.io <guycwilber@...> wrote:
"The article mentions "modified AAR lettering guidelines". When did this take place?"
I would guess that they are referring to the AAR's Mechanical Division dropping the 1" bars (above and below) the reporting marks. If so, the change became effective on March 1, 1957.