This with the picture!
My version of the WP 50' single sheathed autocar. I made the HO patterns 30 years ago with lots of help from Richard Hendrickson. It was my 1st resin car pattern and it has hand scribed boards.
Richard Hendrickson (I think) did an article (in RMJ?) on the Roundhouse and MDC 50' SS double-door boxcars ... listing features for various roads. I'll look it up when I get home tonight, if someone doesn't beat me to it. I *think* your answer is "yes" but want to check.
Al Brown, Melbourne, Fla.