Homestead Ceramic Switch - Set of 2, Unused

Axis ceramic switch.
Purchased several years ago. I intended to install it, but never used it.
Purchased new and unused.
The metal part in the center has slightly discolored due to age.
There is no rust.
The ceramic part has no cracks or chips, but there is a dent on the inside (photo 6). This part will be hidden by the metal.
The instruction manual paper has stains, folds, and torn sections.

Also suitable for interior decoration.
When actually installing, please be aware that the warning states that amateur installation is dangerous.

The metal part in the center is removed by turning it.
Diameter approx. 5.8 cm, Height approx. 4.5 cm