Today I removed the pin also from the CERAMICA LIGURE crosstop paderno type CN 39, where CN means CATALOGO NAZIONALE (needs no translation), in which all the electical equipments were described so that all factories could produce interchangeable pieces. This also for insulators. CN survived till late 1960s, when UN. EL. standard was created. CERAMICA LIGURE (also written CERAMICA LIGVRE) is the older mark of the same factory in Genoa town. Both insulator in this pic are in excellent conditions.