Medium Voltage Film Cutout threaded wood cylinder 354570 street light outdoor

This is a lot of dozens of antique film cutouts used to automatically maintain lighting in a series circuit for streetlights when one bulb in the series failed. They are stored in cool black wood threaded, hollow cylinders, about the size of a film canister. These are VERY hard to find. They were listed in a Westinghouse 1970 replacement parts catalog. One cylinder is empty, but the other four have film cutouts in them. Here's some info about them:

"In 1900 Walter Jones invented what was to become the industry standard for series street lights that is still used today. While his original cutouts were actually little more strips of metal separated by insulating film, Jones' invention was the basis for what is still used today, known as the film-disc cutout or "rupture disc."

Jones actually invented a whole socket system. The luminaire was equipped with a receptacle for a removable lamp socket. The receptacle employed two spring loaded contacts that stayed closed against each othe