Douglas St. Clair wrote:

Does anyone know of a source that can either engrave one or two letters on a
chrome push-pull knob, or that sells pre-engraved push-pull knobs?

Thanks




A sign shop that engraves "bakelite" desk signs might have the
pantograph device with a cutter that will handle that knob. Or a store
in the mall that engraves gifts.

But what is under that chrome? It will be exposed.