Favre-Leuba “Deep Blue”

Swiss Watch Fair 1964
The surging popularity of skin diving is bringing forth a brilliant crop of new underwater timepieces from the ever-inventive Swiss watch industry. This newcomer for example is guaranteed waterproof to a pressure of 20 atmospheres (600 feet). It has a fully automatic movement with sweep second hand and date calendar. The turning outer bezel enables the diver to keep a check on the length of his plunge. (FAVRE-LEUBA "Deep Blue)