An extraordinary collection, made in the purest watchmaking traditions of Longines, combines classic elegance with excellence, aspiring to become the spearheads of the brand offering accuracy at its best. Certified as “chronometers” by the Swiss Official Chronometer Testing Institute (COSC), the movement of these exceptional timepieces includes a silicon balance spring featuring unique properties. The secret to its accuracy is just that, a balance spring engineered to beat with unerring regularity regardless of atmospheric conditions, magnetic interference or temperature fluctuations. The classic dial is elegantly simple; hour, minute and second hand glide over a highly polished dial. A clear sapphire back allows a view of the movement in operation. Owners can select variations in rose gold or in stainless steel and rose gold, a stainless steel bracelet or an alligator strap to secure the timepiece which is available in housings ranging from a slender 26mm to a massive 44mm; Longines.com.