Square ceiling lamp in vintage transparent chiseled glass

Transparent molded glass ceiling lamp, black and white metal base with several holes for fixing, e27 screw bulb, wall lamp or ceiling. Dimensions: length / width about 21.5 cm. Height = 10.5 cm. In good condition. There is a corner with a slight crack at the bottom of the lamp; see last photo. It is neither visible nor disturbing. Once installed, the damaged side faces the ceiling or wall. Some rust bites on the metal.