I don't know for sure but, I think with the last PRR updating or rebuilding with fuel oil stove added the door was changed or modified with the square window. It was done in order the have a screen added to the regular window. One or the other slides down into the door. Remember this was the only window to open except for the copula. I sure hope they don't add the third fold down bunk going across the window like the other PC and Conrail's they done.