The ‘Macdonald’ viola made by Italian artisan Stradivari is seen at Sotheby’s gallery during a preview in Hong Kong

The ‘Macdonald’ viola made by Italian artisan Antonio Stradivari in 1719 is seen at Sotheby’s gallery during a preview before Sotheby’s Spring Sales in Hong Kong April 4, 2014. The rare Stradivari viola, considered to be one of the finest in existence, is expected to fetch more than $45 million in a sealed bids sale this spring, which would set a world record for the most expensive musical instrument ever sold. REUTERS/Tyrone Siu (CHINA – Tags: BUSINESS SOCIETY WEALTH)