Thank you for the assistance. Sorry about the link Tiny, must have been my cut and paste.
The instructions reference various models (603, 700, 701, 702, 704, 800, 807, 900, and 1000). After looking at a couple of visors, I did not see any imprinted model numbers. I was able to identify the Fulton visors by a round chrome cap in the bracket assembly that says "Fulton."
My 49' 3100 is a split window, so I found one with the center support. I checked the size of my windshield, and compared it to the visor. Also, as you mentioned above, the model I wanted has brackets which mount into the door jab of my truck, and not the door frame.
