Sub 300

The DOXA Sub 300 traces its roots to 1967, when it debuted as a pioneering dive watch purpose-built for professionals and recreational divers alike. Its cushion-shaped 42.5mm case, signature orange dial (though available in other colors), and patented no-decompression bezel quickly set it apart, cementing its place among serious tool watches. Collectors value the Sub 300 for its authentic connection to the golden age of diving, and its enduring association with Jacques Cousteau, who famously endorsed the model through U.S. Divers Co.

Reference numbers like SUB 300T and the modern SUB 300 reissue mark key distinctions: the original 300T used a thicker case and a different movement, while the current SUB 300 reissue stays truer to the original’s slim profile and dial details. The modern Sub 300 runs the COSC-certified ETA 2824-2 automatic movement, a point in its favor for accuracy and reliability, and carries 300m water resistance—ample for diving and daily wear. Variants differ by dial color and bezel type, with rarer colors (like the “Aqua Lung” or “Sharkhunter”) sometimes commanding a premium.

Pricing varies based on condition, completeness (box, papers, bracelet), and whether the watch is a vintage original, a 50th Anniversary reissue, or the current production model. Vintage examples, especially with original beads-of-rice bracelets and unpolished cases, fetch the highest prices, while new models offer modern build quality with vintage charm. When shopping, confirm the reference and dial variant, as subtle differences can mean a meaningful jump in value or collectibility.