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Quick TakeThis SUB 300T Aquamarine isn't just a watch; it's a burst of tropical ocean energy strapped to your wrist. That Aquamarine dial is pure joy, a vibrant contrast to the serious, purpose-built engineering that surrounds it. You feel the heritage, the echo of the pioneering Conquistador, every time you glance at the no-nonsense case and the patented bezel ready to calculate dive times. Knowing it can plunge down to 1,200 meters and has a helium release valve gives it serious underwater cred, even if its biggest adventure is navigating rush hour traffic. Yet, it’s not just a brute; the sapphire crystal shrugs off scratches, and the automatic movement ticks away reliably. Whether on the famously comfortable "Beads of Rice" bracelet or a flexible rubber strap, it feels balanced and ready for action. It’s a watch that takes its job seriously but doesn't forget to have fun, bringing a welcome splash of color and history to any situation.
DescriptionFabricated using high-grade 316L stainless steel, the case structure provides significant durability and resistance to corrosion. Dimensional specifications are recorded as 42.50 mm by 44.50 mm, with a vertical profile measurement (height) of 13.65 mm. Water ingress protection is engineered to a rating of 120 ATM, equivalent to a hydrostatic pressure depth of 1,200 meters or 3,937 feet. Integrity at depth is further assured by the incorporation of a screw-down crown mechanism and a solid stainless steel screw-down case back. A key feature for saturation diving applications is the integrated helium release valve, a nod to the original 1968 Conquistador model which pioneered this technology for publicly available dive watches. Protecting the dial is a scratch-resistant sapphire crystal, enhanced with an anti-reflective coating to improve legibility by minimizing glare under various lighting conditions, crucial for underwater visibility.
Powering the timekeeping functions is a Swiss mechanical automatic movement, featuring self-winding capability. Operating parameters include a frequency of 28,800 vibrations per hour (4.0 Hz), contributing to the smooth sweep of the seconds hand and overall precision. Upon being fully wound, the movement maintains a power reserve of approximately 38 hours. Although specific caliber details are not provided beyond its Swiss origin and automatic nature, the movement includes decoration applied by DOXA. Time is indicated via central hour, minute, and second hands, supplemented by a date complication. Legibility in low-light environments, particularly underwater, is optimized through the application of Super-LumiNova luminescent material to critical dive-relevant elements on the dial and bezel. The timepiece incorporates a unidirectional rotating bezel, calibrated in feet, featuring the patented integrated no-decompression dive time calculator system for enhanced diver safety and planning. Attachment to the wrist is facilitated by either a 316L stainless steel "Beads of Rice" bracelet or an FKM rubber strap, both options equipped with a folding clasp incorporating a ratcheting wetsuit extension mechanism for easy adjustment over dive suits. The lug width dimension is specified as 20.00 mm.