Caravelle Set-O-Matic Dual-Day Diver Watch

This is a vintage Caravelle Set-O-Matic Dual-Day diver's wristwatch, likely dating to the late 1970s based on the provided context of 1977. The timepiece features a robust, tonneau-shaped stainless steel case with integrated design elements. The dial is a dark matte black, accented by aged tritium or luminous hour markers that have developed a warm cream patina. A prominent yellow sweep second hand provides a sharp color contrast against the monochrome dial. The black rotating 'coke-style' bezel includes a red highlight section (typically representing the first 15-20 minutes of dive time) and show signs of minor scratching and age-related wear. At the 3 o'clock position, there is a distinct day-date window with a vertical 'dual-day' orientation, a hallmark of Bulova's Caravelle line. The crystal appears to be acrylic and shows some surface scuffs. The watch is presented on what appears to be a factory-style stainless steel bracelet. The overall condition is consistent with an authentic tool watch from the late 70s, displaying honest wear without excessive damage. Movement is likely an automatic self-winding caliber, common for the Set-O-Matic series.