Made in Czechoslovakia Made of glass, brass. With Aged patina (see Foto). 1xE14 or E15 socket. New cabling. Re-polished. Original condition. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution, Up to 250V (Europe/UK Standard).The wiring of this item may be original and might need replacement, if not specified otherwise.