Longines Watch Flagship Ladies L4.374.4.59.6. 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.