SUB 300T

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In 1969, DOXA launched the SUB 300T Conquistador, the first general public diver's watch equipped with a helium release valve. 50 years later, the new SUB 300T presented in September 2019 pays tribute to the groundbreaking original.

This 3-hand diver's watch, available in 6 dial colors, combines the aesthetic genes of the SUB 300T Conquistador with the technical refinements that define the high-performance diver's watch of today. Constructed from 316L stainless steel of the highest quality, the SUB 300T has a diameter of 42.5mm and a scratch-resistant sapphire crystal with an anti-reflective coating. Rated to withstand pressures up to 120 bar, this diver is effectively waterproof to a depth of 1,200 meters and features the patented unidirectional rotating bezel with an integrated no-decompression dive time calculator. All elements providing dive-relevant information are highlighted with a Super‑LumiNova® luminescent insert to ensure optimal legibility underwater. The bracelet is 316L stainless steel and features a folding clasp with the DOXA fish symbol.



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


  • Stainless steel case
  • Diameter  42.50 mm x 44.50 mm
  • Height 14.00 mm
  • Screw in crown  
  • Water resistance 120 bar / 1200 meters / 4000 ft
  • Solid stainless steel, screw down case back


  • Hours, minutes, seconds
  • Date


  • Sapphire glass
  • Unidirectional rotating bezel 
  • Stainless steel strap "separate Beads of Rice" style attached by screws to ensure a secure fit
  • FKM rubber strap
  • Folding clasp with wetsuit extension, DOXA fish logo
  • Lug width 20 mm

Bracelet acier

Professional 879.10.351.10 Available
Searambler 879.10.021.10 Available
Sharkhunter 879.10.101.10 Available
Caribbean 879.10.201.10 Available
Aquamarine 879.10.241.10 Available
Divingstar 879.10.361.10 Available


Professional 879.10.351.21 Available
Searambler 879.10.021.20 Available
Sharkhunter 879.10.101.20 Available
Caribbean 879.10.201.32 Available
Aquamarine 879.10.241.25 Available
Divingstar 879.10.361.31 Available
USD 1,890
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