This year, ArtyA is turning this notion on its head with a world’s first. For the first time ever, ArtyA brings Nano-Sapphire technology into the watch industry to change the color of the sapphire crystal case itself. The new ArtyA Purity Tourbillon Chameleon features a nano-sapphire crystal case —measuring 46 mm in diameter— that just as its name conveys is a true chameleon.