Staircase helical vintage 1970

Rare large helical staircase 1970, while cast nickel-plated aluminum, works in sipo and massive ebony. 12 steps mounted on a central mast. It is part of a series of four, made for a fancy building in St. Cloud, each duplex apartment in was equipped. Wooden steps have been stripped/sanded, ready to be oiled or varnished. Good condition, some signs of wear inherent in the time passing... sold without railings, missing