>> Reuters Published: 08 May 2021 02:24 PM BdST Updated: 08 May 2021 02:24 PM BdST Royal Collection Trust staff pose beside some of Leonardo Da Vinci's anatomical studies at A Life in Drawing, the largest exhibition of Leonardo's work in more than 65 years, at The Queen's Gallery, Buckingham Palace in London, Britain, May 23, 2019. REUTERS/Dylan Martinez A drawing of a bear's head by Leonardo da Vinci is seen fetching up to $16.7 million, potentially setting a record, when it heads to auction in July, Christie's said on Saturday. "); } Measuring 7 cm (just under 3 inches) squared, "Head of a Bear" is a silverpoint drawing on a pink-beige paper. The auction house says it is "one of less than eight surviving drawings by Leonardo still in private hands outside of the British Royal Collection and the Devonshire Collections at Chatsworth".