Leslie Controls R.S. SERIES AIR WHISTLE

Originally designed to meet the needs of the railroads for an extremely low air consumption unit with increased sound output and a distinctive range of notes, the Leslie-Supertyfon has proved itself to be by far the most efficient of all air whistles of any design. The unmatched performance and economy of the railroad Leslie-Supertyfon is also available for industrial and marine applications. • Cushioned Diaphragm—A silicone rubber ring molded to the outside edge of the diaphragm eliminates metal-to-metal rub-bing and wear. • Reliable Operation—Endurance test for over 2,000 blowing hours with no significant wear or change in performance.