Capodarco Elettronica | Italian brand now inactive - Maker of Metrology sources

[Kiriakos GR]

Bellow it is a picture of testing source aiming quality verification of analog phone lines.

Maker this is Italian Capodarco Elettronica, past known location Roma.
Nothing of the past of this brand it is traceable due internet.

But they did something interesting in this product design, they did use porcelain as insulation at the top of this test box.