The sleek, black panther that crouches atop rings, swings provocatively from necklaces and roams across watch faces is synonymous with Cartier. What began as a smattering of diamond and onyx spots on a wristwatch dating from 1914 grew into one of the most famous felines in the world, with a new Cartier Panther collection launched in 2014 to coincide with the big cat’s 100th anniversary.