Delfin
Model History
The Delfin was born in 1961 as Edox's answer to the water-resistance challenge, in a decade when Swiss diving watchmaking was defining its technical standards. The model introduced a double-backed case and a patented gasket system — the "double O-ring", made of rubber and nylon — placed between crown and case, capable of guaranteeing watertightness beyond 200 meters: a result that at the time represented a genuine leap in quality over the standards of the day.
The Delfin's true innovation was not just the depth achieved, but the ability to wind the crown and set the time in complete safety even while diving, thanks precisely to the double-gasket system. It is this technical detail, more than the aesthetics, that earned Edox the nickname "Water Champion", still claimed by the brand today, and that laid the groundwork for later developments: already by 1965 the Hydro-Sub, a direct evolution of the Delfin's system with a novel tension ring on the crown, would push water resistance up to 500 meters.
Today the line continues with the "Delfin The Original" family, which reinterprets the historic model in a contemporary key: automatic day-date, chronograph, or in the open-worked "Mecano" version, all sharing the same screw-down crown with double O-ring that made its fortune. The Delfin thus remains, in the Edox catalogue, the declared starting point of the brand's entire diving vocation.
Technical Specifications
Main Executions
According to the brand itself, the double O-ring system patented with the Delfin did not remain an Edox exclusive: the double-gasket crown technology was later said to have been adopted, in evolved forms, by other major Swiss watch houses too — a technical legacy that goes well beyond the single model that made it famous.

