Launched in the 1960's on both US and European markets, similar to the Deep Sea Alarm, known as either the Vogue or Shark chronograph depending on its final sales destination. This example signed LeCoultre for the American market, was available with three types of bezel, a GMT, a diving, or such as this example the rare World Time bezel. Measuring a nice 40mm.and equipped, like the manual wind Rolex Daytonas with a caliber Valjoux 72, a rare and attractive diving chronograph.