DOXA SUB 300T Professional Automatic – 840.10.351.21
DOXA SUB 300T Professional Automatic – 840.10.351.21
DOXA SUB 300T Professional Automatic – 840.10.351.21

DOXA SUB 300T Professional Automatic – 840.10.351.21

SKU: 001-545-11775

Regular price $1,950.00

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The DOXA SUB 300T Professional pays homage to its legendary predecessor, the SUB 300T Conquistador, by integrating vintage style with cutting-edge features. Crafted from 316L stainless steel, its 42.5mm x 44.5 mm case is built to withstand the pressures of the deep sea, offering a water resistance of 1,200m. The sapphire crystal, with an anti-reflective coating, ensures clarity even in the most challenging environments. Driven by a Swiss mechanical automatic movement, the watch delivers precise timekeeping with a 38-hour power reserve.

For underwater enthusiasts, the SUB 300T Professional is equipped with a screw-down crown and case back to ensure maximum water resistance and protection against moisture. The unidirectional rotating bezel facilitates precise dive time tracking. Enhanced with Super-LumiNova luminescent inserts, the bezel guarantees legibility in low-light conditions, crucial for underwater expeditions. The watch incorporates a helium release valve, a vital component for saturation diving, enabling the safe expulsion of trapped gas during ascent.

With its blend of vintage-inspired aesthetics and contemporary engineering, the SUB 300T Professional serves as a reliable companion for both seasoned divers and watch enthusiasts alike. It captures the essence of exploration and adventure while embodying DOXA's rich heritage and unwavering dedication to excellence.
Band Strap with Pin Buckle
Band Color Orange
Band Material Rubber
Case Material Stainless Steel
Case Size 42.5mm
Case Thickness 13.65mm
Caseback Closed
Clasp Buckle
Collection SUB 300T
Collection 2 Professional
Crystal Sapphire Crystal
Dial Orange
Function Date
Gender Men's
Lug Width 20mm
Lug-to-Lug 44.5mm
Movement Automatic
Power Reserve 38 Hours
Water Resistance 1200m
SKU # DOX-840.10.351.21


Little Treasury Jewelers is the watch and jewelry store destination for the greater Baltimore-Annapolis area. Providing a piece for all of life’s occasions, offering a collection of wedding and engagement jewelry, fine timepieces, children’s jewelry, and gifts. With a selection of fine watches unequaled in the area, international jewelry designers, and a repair facility on the premise, Little Treasury is truly a “hidden gem” in Maryland.