<elden.j.gatwood@...> wrote:

I thought it was the AAR alternate standard
car, which has never been done by anyone, has it?

Indeed they have been done, and in multiples...just NOT in a "popular" scale. Rich Yoder of Rich Yoder models

http://www.richyodermodels.com/

has done several variations of the AAR Alt. Std., especially the many C&O variants...

Matt Forsyth

Modeling the D&H Penn Division/
Erie Jefferson Divison in "O" Scale,
Fall, 1951