In the year 2000, the Corum Bubble was born as a fun and playful watch, created during the time of Severin Wunderman. Its standout feature is the large bubble-shaped sapphire crystal, rumored to be influenced by the iconic Rolex Deep Sea watch. After a brief hiatus, the Bubble made a comeback at the 2015 BaselWorld event. The 2015 colección included the Bubble reference L082/02849 'Op Art Sphere²', boasting a stainless steel case with a cool blue PVD coating and a mesmerizing 'op art' dial.