I am going through our shelves and found nine styles of top bow body brackets some are touring rears and some are roadster fronts all have threads for prop nut, can you tell which ones are for which year, I put a letter on each along with a tape measure, Bob
I believe "I" is a '25 roadster, rh top iron. The screw goes through the striker plate. "H" I believe is the same thing for an earlier model.
I think I have "H"'s on my 25 touring.
The "D" marked top iron bracket is exactly like the ones on my 21 Touring project. This is the one that is just behind the rear Touring doors that is used for the middle bow mount. It probably would work on the Tourings between 17-22 with the 2 man tops with the low cowl bodies. It may work on the roadster also. But not sure. Some may call it the rear bow but its not exactly in the 'rear'. Just close to it.