The Turn Of The Century Electrotherapy Museum

How To Make 1890s Hard Rubber/Ebonite/Vulcanite Washers... 2008

Looks like a Victorian washer!

It evolved from one of these

Which was derived from one of these...

Which was cut and chiseled from one of these!

1950s? Bowling Ball:  $8.52 at a local thrift store/bazaar
2" Hole Saw:  $14 at the hardware store

Making a vintage 1890s high voltage insulating washer out of a material no longer available for decades:  PRICELESS!!