I bought this brand new decades ago. It has been wrapped up in the original waxed paper you see it in above since. This is the real deal cast iron 4 bolt 229mm OD rear brake rotor only found on early Ducati Super Sports including the infamous "Greenframe" 750 SS.
This is factory NOS (new old stock) never mounted and previous to me taking the photos you see here, never even unwrapped. It is in literally PERFECT condition with zero corrosion or blems. The center part is painted silver if you can not tell from the photos.