Year 2009 marks the fiftieth anniversary of Certina's famous Double Security “DS Concept”. These two emblematic letters, visible on every Certina timepiece, bear witness to the unique protection system developed by company engineers at the Swiss watchmaking brand in 1959. The acronym speaks for the extensive history and experience of the Swiss watchmaker, and the rich years of scientific expeditions, extreme sport and adventure, which testify to its outstanding precision and reliability.