Wall lamp Art Deco opaline porcelain years 20-30

Art deco wall lamp from the 20s and 30s. Porcelain frame. Brass socket. Opaline lampshade. Very nice overall condition. Note some original defects on the opaline in places and a tiny shine on the perimeter of the aperture (see photos and zoom). The total height of the wall lamp is 18.5 cm. The total depth of the wall lamp from the point of attachment to the wall is 21 cm. The maximum width of the opaline at the opening is 11 cm. The wall lamp works with a bayonet bulb not supplied.