The "third" Swiss dive watch: Cornavin P.810

The “third” Swiss diving watch: Cornavin P.810 After Rolex and Rayville-Blancpain, a small Geneva factory launched the third Swiss diver's watch. Virtually no trace of it remains today. It bore the initials AMF and P.810 on the back, was unlike any other, and was the first watch to display decompression times as a function of depth and dive time. But we're about to discover that this surprising watch owes much to a French diver...

The rest is here