In Longines� purest watchmaking tradition, the Record automatic models combine classic elegance and excellence, aspiring to become t he spearheads of the brand. And there is no shortage of arguments for these exceptional timepieces, whose movement includes a single -crystal silicon balance spring with unique properties. A first for Longines, it is certified as a 'chronometer' by the Swiss Offici al Chronometer Testing Institute (COSC), a designation awarded to all of the pieces in the Record collection.