I decided to try and gather as many of my old bulbs and information that i have here to help you all understand the changes that happened over the 50 or so years the old C6 Ge bulbs were produced the bulb itself changed very little in design however the Paint and Marking as well as the Screw base changed a few times over the years , of course there is conflicting information out there on these and I have done my best to at least attempt to at least be Generally as Accurate as I can be I hope you all enjoy this presentation