Half globe opaline ceiling light, diameter 20 cm, with base

This ceiling light, which can also be installed as a wall light, has a beautiful white opaline globe typical of the 50s and 60s. The fixing system is original: once installed on the ceiling or wall it is invisible, because it is entirely under the globe. So to remove the globe (when changing the bulb), you pull on a metal tab (almost invisible because it is hidden under the globe) then you rotate it, which has the effect of retracting the small internal tabs that hold the globe (be careful, you must then hold the globe to prevent it from falling!). The globe does not have any chips, but some small abrasions and stains but which will be almost invisible once the lamp is installed because they are located on the base or on the edge near the base. The fixing system has large traces of corrosion on which I applied an anti-rust product to stop the process (i think it must have been used in a damp place). In addition, this base no longer has the socket, so you will have to add it. If you don't want to bother with the base because you are looking for this globe to replace a broken one, please let me know. The globe is 20cm in diameter, about 10cm in height, the opening is 14cm in diameter.