Well all's I have for today's ACCESSORY OF THE DAY post is the box for this one found at an estate sale with two large magneto bulbs in it. I think this was two units that fit the back of each head light socket. If you have this setup please post a photo on this thread.
The box artwork looks to be etched or stamped into the cardboard on several sides.
Wow! 200% more light.
Do you figure these were just a big capacitor? That might even out the flicker. I'm not an electricity expert mind you.
look more like candles