Have a 69 with an antenna that looks just like the expensive repro except the top bezel has 2 pins on it at opposite directions and 2 screws holding it down. Do i have the wrong antenna or is it an early late production thing ? On top of the fender is a gasket,then a plate w 2 screws diagonal and two holes for the pins in the bezel.Looks like its been there for 40 plus years ...