Help needed with identification of arched floor lamp, marble base, curved stainless steel stem and white plastic hood  

Does anyone know the origin of this floor lamp? It has a very heavy marble base, a stainless steel stem, which is curved, not-adjustable and square. The hood is white plastic. The stem looks very similar to the one from the famous Arco lamp from the castigliano brothers, but the marble base is different, as it consists of two square tiles held together by stainless steel at the back. The hood is also different as it is made from plastic/plexiglass. The lamp is very heavy. I find the design beautiful and the details show great workmanship. I think the lamp is probably from the same period as the Arco, but cannot find who made or produced it. Can anyone help me out? Thanks!
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