While the AIRSTAR was a departure from the traditional tool dive watch that Aquastar has become famous for among divers and aquanauts like Jacques Mayol and Phillipe Cousteau, it still featured a depth rating of 200 metres, a screw-down crown and many attributes essential for ...While the AIRSTAR was a departure from the traditional tool dive watch that Aquastar has become famous for among divers and aquanauts like Jacques Mayol and Phillipe Cousteau, it still featured a depth rating of 200 metres, a screw-down crown and many attributes essential for serious water resistance. This model is limited to 300 pieces per year; and is numbered and engraved on the case back.