28-06-2022, 11:05 PM
I rebuilt the door frame completely on my '32 van and it looks very similar to your framework. I attach a couple of pictures and confirm my old and new frames had felt channels on the sides and top of the window. Unfortunately I do not have a picture looking upwards at the top channel but it is there! Note the wiggly piping run trapped by the inner top piece of ash; that makes the fitting of that piece tricky to allow for that. On the first picture it is ready to attach the flat trimmed board.