The Duchess of Cambridge (Kate Middleton) has worn her Givenchy Obsidian SGV 773 sunglasses a handful of times over the last few years. (To Wimbledon in 2012, to a polo match in 2014).
About the sunglasses:
According to smartbuyglasses.com, they retailed for $170 USD.
The same site dates the sunglasses to 2012.
They feature plastic frames with polycarbonate lenses that offer 100% UV protection.
There’s a distinctive gold detailing and brand logo stamped on the ear stems.
Kate wore the Givenchy Obsidian glasses in black but they were also available to buy in brown.