I just now, after owning my Norton for 13 years, realized that my headlight shell does not look like the headlight shells in the parts book. My bike is '73 per the plate, registered as a 74. My headlight shell has a toggle switch that is to the rear of the three warning lights. All the headshells I see in the parts book show the toggle switch forward of the warning lights. So does that mean my headlight shell is an aftermarket replacement part that "got it wrong?" FWIW Old Britts shows a headlight shell that looks like mine but, again, unless my Norton Parts book is wrong, it's different than those shown in the book. Also, I have a sealed beam headlight (a replacement from India when I bought the bike) but I want to go back to the OEM-style headlight and maybe install an LED bulb. I can't figure out what I need parts-wise to replace the sealed beam. I assume a reflector and a lens ???? Part numbers would be good!