An introduction to Doxa’s SUB 300T Conquistador


July 2021

An introduction to Doxa's SUB 300T Conquistador

This timepiece is one of the most emblematic diving watches in horological history. It is now available in a choice of six dial colours.


n 1969, DOXA unveiled the SUB 300T Conquistador. Reliable, efficient and affordable, it was at the time the first diver’s watch to come equipped with a helium release valve, a unidirectional rotating bezel for setting no-decompression dive times and an orange dial for exceptional underwater legibility. It set the benchmark for what a purpose-designed diver’s watch should be.

Half a century later, the new SUB 300T Conquistador pays tribute to this historic model. The legend returns with a choice of six original dial colours: orange, of course (Professional); yellow (Divingstar); navy blue (Caribbean); turquoise (Aquamarine); silver (Searambler); and black (Sharkhunter).

An introduction to Doxa's SUB 300T Conquistador

The pressure resistance of 120 bar (1,200 metres) and the helium release valve make it possible to dive to considerable depths. The patented unidirectional rotating bezel provides a dual indication of dive time in minutes and depth in feet. All the display elements related to diving information are coated with Super-LumiNova®.

An introduction to Doxa's SUB 300T Conquistador

Manufactured from 316L stainless steel of the highest quality, the DOXA SUB 300T’s case has a diameter of 42.5mm and is topped with a scratch-resistant sapphire crystal.

An introduction to Doxa's SUB 300T Conquistador



  • ETA 2824-2
  • Automatic, self-winding
  • 42 hours Power Reserve Frequency 28800.0 vph (4.0 hz) 25 Jewels
  • Decorated by DOXA


  • Stainless steel case 316L
  • Diameter 42.50 mm x 44.50 mm
  • Height 14.00 mm
  • Screw in crown
  • Water resistance 120 bar / 1’200 meters / 4’000 ft
  • Solid stainless steel, screw down case back


  • Hours, minutes, seconds
  • Date


  • Sapphire glass
  • Unidirectional turning bezel
  • Numbering in color (depth) and black (time), light point at 12 o’clock


  • Orange, yellow, navy blue, turquoise, silver and black with painted index with luminescent material
  • Painted hands with luminescent material
  • Painted minute-tracks


  • Stainless steel 316L bracelet or FKM rubber
  • Deployant buckle with DOXA fish logo

Suggested retail prices

  • Stainless steel bracelet: CHF 1’890
  • Rubber: CHF 1’850

An introduction to Doxa's SUB 300T Conquistador

The Europa Star Newsletter