Doxa Watch SUB 300 Beta Sharkhunter 830.20.101.20. The 'Beta' factor - there's a method to the madness. Beta, for beyond the conventional. Because it's not just about re-combining colors, materials and textures. Always in touch with the contemporary lifestyle, and aware that diving watches need to adapt to city life, DOXA created a watch with a perfect blend of urban sophistication and contemporary elegance. Starting from the premise that a sports watch should feel right under any circumstance, the SUB 300B Sharkhunter retains all of its original DNA while cultivating a sleeker, more stylish appeal. Here, DOXA ever so slightly reworked the design to achieve a slimmer watch, resulting in a profile of just 11.95mm (13.65mm for the SUB 300T) as well as a lower bezel height (by 0.5mm compared to the SUB 300T.