Limited Edition of 300 Pieces. Doxa Watch SUB 300 Carbon Aqua Lung US Divers Limited Edition 822.70.101AQL.20. The elegance of a high tech material, forged carbon. The prestigious official seal of quality and precision, COSC Certified Chronometer. The result of a partnership that reconnects two legendary brands, DOXA and Aqua Lung. An emblematic heritage, US Divers. The SUB 300 Aqua Lung US Divers builds a bridge between the past and the future. It is the first time the legendary SUB 300 comes in carbon. After more than 130 years of watchmaking tradition, DOXA is still breaking new ground.