Thanks you Randall and Frank.
As I had mentioned, I have a drawing from the bulletin. It appears it may be a supplemental drawing issued after the original was issued. It shows the early TR4 bracket (drawing that Frank attached above) and how to attach the bracket and radio. The title of the drawing is "Special Instructions for Use of Wrinkle Finish Radio Mounting Bracket". "Wrinkle Finish" is double underlined, placing the emphasis on those words. I would like to see if the bulletin mentions the other radio bracket or has a drawing of it.
My goals are to find the correct original bracket for my early TR4 with the vinyl covered lower support bracket, and in the process, possibly clear up some of the confusion on the many versions of these two brackets.
gary