DOXA SUB 300 Aquamarine Watch 821.10.241.10

The DOXA SUB 300 Aquamarine 42.5mm (Ref. 821.10.241.10) revives the revolutionary 1967 SUB concept considered the first truly purpose-designed diver’s watch accessible to a broader public whilst the distinctive aquamarine dial continues DOXA’s radical innovation of improving underwater readability through bold colour application. The unidirectional rotating bezel with dual scale for depth and dive time represents a DOXA patent that established the benchmark for professional diving calculations without decompression stops.

At 42.5mm with 13.40mm thickness through 316L stainless steel construction, this provides authentic vintage proportions whilst the domed sapphire crystal with anti-reflective treatment maintains the same shape as the original 1967 plexiglass. The iconic “beads of rice” stainless steel bracelet with folding clasp and wetsuit extension creates distinctive heritage character whilst all dive-related markings feature Super-LumiNova coating for excellent low-visibility readability.

The Swiss mechanical automatic movement delivers reliable 38-hour power reserve through COSC certified chronometer construction operating at 28,800 vibrations per hour whilst DOXA decoration demonstrates attention to detail. The self-winding mechanism ensures dependable daily operation whilst maintaining the precision and robustness essential for professional diving applications.

The screw-down crown and 300m water resistance validate serious diving capability whilst the date window at 3 o’clock provides practical calendar function. The unidirectional bezel enables calculation of safe ascent times through dual depth and time scales.

This SUB 300 Aquamarine suits diving enthusiasts and collectors seeking authentic 1967 heritage with distinctive colour innovation and proven COSC chronometer reliability. The revolutionary dual-scale bezel and beads of rice bracelet create unmistakable character whilst the comprehensive diving functionality and chronometer certification ensure professional capability that honours DOXA’s pioneering contribution to purpose-designed diving watch development.