Manufactured circa 1920’by Abolite. Back when these lights were manufactured, blue porcelain shades were far more expensive to produce than their white or green counterparts, thus they cost substantially more.
Has “Holophane No. 823” on 1 side and “Corridor” on opposite side. 1 has bolt on opposite side, the other is missing. It is a common bolt. Does not appear to have any scratches either. Glass is dirty, I did not clean.
