Leonardo Oil Brings $5-Million; National Gallery to Buy Work From Liechtenstein Leonardo Portrait Brings $5-Million
Natl Gallery agrees to buy Leonardo por of Ginevra dei Benci from Prince Francis Joseph Il of Liechtenstein for record $5- to $6-million; Prince's adviser Dr G Wilhelm denies painting has been sold; declines comment on repts painting is now in Washington; efforts by others to buy work recalled; painting thought to have been in Liechtenstein collection since 17th century; illus