[RSwank]

Here is a photo of the "porthole" windows. The center circular plexiglass plug can be "unscrewed" and removed from inside the plane.

https://www.davewilsonphotography.co.../c-47-windows/


Article on the plane includes a video from the inside of the plane (see toward the end of the
article):

\\https://www.popularmechanics.com/mil...-anniversary/\

You can buy an insert if your C-47 is missing one. ;-)

https://www.paratrooper.fr/en/usaaf/...000541562.html