Made in czechoslovakia made of glass the pendant is equipped with a new electrical installation 1xe27 or e26 bulb us wiring compact. In perfect original condition never used, we send it in original boxes. 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.