Doxa SUB 300T Searambler 840.10.021.10

The Doxa SUB 300T Searambler 840.10.021.10 is a modern expression of one of the most recognizable professional dive watches ever created, combining Doxa’s rich underwater heritage with contemporary build quality and performance. Featuring the brand’s iconic 42.5mm stainless steel cushion case, this reference stays true to the design language that made Doxa a favorite among professional divers in the late 1960s and 1970s. The signature silver “Searambler” dial offers a cleaner, more understated aesthetic than Doxa’s famous orange Professional models, while maintaining outstanding legibility through bold luminous hands and markers. Paired with the patented unidirectional bezel featuring both dive time and no-decompression scales, the SUB 300T remains one of the most purpose-built dive watches on the market.

What makes the Searambler configuration especially appealing is its versatility. The sunburst silver dial catches light beautifully, giving the watch a more refined presence without sacrificing its tool-watch character. Powered by a Swiss automatic movement and rated to an impressive 1,200 meters of water resistance, the SUB 300T is every bit as capable beneath the surface as it is on the wrist. The signature beads-of-rice bracelet completes the vintage-inspired package, offering exceptional comfort and a direct connection to Doxa’s historic dive watch legacy. For collectors, the 840.10.021.10 delivers the perfect balance of heritage, functionality, and distinctive styling—making it one of the most wearable and versatile references in the modern Doxa lineup.

Reference: 840.10.021.10

Bracelet: Stainless steel bracelet "Beads of Rice", folding clasp with ratcheting wetsuit extension

Case: 42.5mm x 13.65mm Thickness x 44.50mm lug to lug - Stainless Steel

Lug Width: 20mm

Water Resistance: 120 ATM / 1,200 meters / 3,937 feet

Movement: Swiss Mechanical Movement - Automatic

Functions: HMS, Date, Helium Release Valve

Box and Papers: Box and Papers

Crystal: Sapphire

Bracelet size: 7.75”

New

DOXA, founded in 1889 by Georges Ducommun in Le Locle, Switzerland, has a rich history of watchmaking innovation. Initially gaining recognition for its pocket watches and dashboard clocks, DOXA's defining moment came in 1967 with the introduction of the SUB 300 dive watch. This groundbreaking timepiece, featuring an iconic orange dial, unique no-decompression bezel, and purpose-built design for recreational divers, quickly became a benchmark in the industry. Notably, in collaboration with Rolex and the introduction of the Sea-Dweller, DOXA co-developed the now-common helium escape valve concept, adding another feather in its cap as a true diver’s tool in its day. DOXA's reputation was further enhanced by its association with Jacques-Yves Cousteau and its frequent appearance in Clive Cussler's adventure novels.

Despite facing challenges during the quartz crisis, DOXA experienced a resurgence after its acquisition by the Jenny family in 1997. Today, the brand continues to honor its diving heritage while embracing modern watchmaking techniques. DOXA's journey from a small Swiss workshop to a globally recognized dive watch manufacturer demonstrates its enduring commitment to innovation, quality, and functionality. The brand's iconic designs, particularly the SUB series, remain popular among diving enthusiasts and watch collectors alike, cementing DOXA's place in horological history.