Thanks to Aj we have a source of dome washers for our projects. Here is a simple way to give them the antique look and feel with a Dremel and mandrels https://imgur.com/gallery/zrYXmXH Using the Dremel mandrels with the very fine threads (~= to .072) And filing the outside of one down to about about an 1/8th inch we have file/knife supports for making a couple grooves in the washers. I used the blade of an Xacto knife to get close but a very sharp cornered file could do the job. Do the outside diameter first and then the smaller diameter. The old blade in the photo has the final bit. I sued a 15ga/4D steel nail for the pinning. Solid brass would also work. Have fun! ~Richard PS. This should work to make larger ones from decorative beads using small diameter washers and the mandrel set screw for the diameters of the grooves.