This is a CD unlisted rar Hungarian glass. At the first electrifies the neutral wires were signed with glass Insulators, others were porcelains. Manufacturer is unknown, no embossing, but I know: this type is older than the CD 455, 456 brothers. It is super rare, the find is difficult, such a cobalt blue Hemingray-19. Hungary is a porcelain country.

This Insulator has a small shell chip on the base of the inner skirt because of the cemented pin's removing, it has some small bubbles.. It is clear

$120 USD by International Money Order, $125 USD total by PayPal