Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
That Wikipedia article doesn't even cover them all. I proposed to my ex on a C-41A.l
Another interesting aircraft is the C-41 and C-41A. These have no cockpit door and has a reinforced plates on both sides. The other one I've seen is at Castle Air Museum. Castle Air Museum Plates and no cockpit door.
Javis,Thank you for beautiful comparison between C-47 and C-53