An update to my post of February 6, 2009, the Portariviste by Rodolfo Bonetto for Bilumen. Only this pair in white doesn’t appear to be from Bilumen because there is no imprint on the bottom. Described by the seller as “Not exactly sure as to who designed this, but it is vintage, as the estate this came from was fully loaded w/mid century items.” So there is no imprint, stamp, or information elsewhere on these pieces.
The pair was sold from Sarasota, Florida, USA on 1/31/11. The condition was described as there being “age discoloration & minor surface wear. no chips nor cracks.” There were 4 bidders and 5 bids with a selling price of $58.99. Shipping added $20.