The Doxa SUB 300T is a luxury watch with a unique tonneau-shaped stainless steel case, inspired by the original 1969 SUB 300T Conquistador. This model was one of the first watches to feature a helium release valve and has now been upgraded with improved waterproofing of up to 120 bars. It runs on a self-winding movement with a date function, specifically the caliber 2824-2. The reference 840.10.101.10 showcases a sleek black dial, adding a touch of sophistication to this timepiece.