Longines Flagship Collection Swiss Quartz Watch With A Blue Alligator Embossed Leather Strap, Silver Coloured Stainless Steel Dial & Sunray Blue Coloured Dial With Date Window. The launch of the first Flagship by Longines in 1957 was met with resounding success. Today, this timeless collection can still be found in the brand's range of products in a reworked form. Each fitted with a self-winding calibre, these models will enchant lovers of classic, robust watches. A wide range of dials and a selection of sizes mean that everyone can find the watch that suits him or her.