Corum Bubble Boutique Edition 163.150.20, boasting the thickest sapphire crystal (8mm) on the market, recreates the style and optical distortion of vintage Rolex Deepsea special experimental dive watches in a modern pop culture tribute. Designed by the talented and eccentric late Corum owner Severin Wunderman, the 45mm case size of this Bubble Diver is now discontinued and unobtainable from dealers. This quartz battery powered piece features a white dial with stainless steel Arabic numerals, date at 6, green lume dots, and comes on a brown alligator strap.