Industrial Factory Light with Open Top.
The French Mazda first made such lights in the 1930s under the name Réflectolux, they have been widely produced ever since.
black enamelled shade (weathered), white enamelled inside;
New E27 fitting, rewired;
French hanging / pendant / suspension lamp;
Mazda based in Lyon France not the Japanese car manufacturer;
utilitarian, design, vintage, retro, 50s, 1950s, fifties, enamel, patina,