Oooh I just love a mystery
Presumably "Bonvita" was the design name, but the original print advertisement which I obtained from the USA recently, doesn't state who actually made it. It came from a 1957 publication, and the table lamp was for sale at that time at Bonniers Gallery, New York City for 35 USD.
Do you know which glassworks it came from or have any further information about it please? :rn: