Longines is celebrating its 50,000,000th watch, a one-off special edition from its Master Collection. The watch pays tribute to the brand's heritage with a classic design that features a 40mm diameter rose gold case, an L897 automatic calibre with a 64-hour power reserve and annual calendar functionality, The hours, minutes and seconds move with the blued-steel hands that stand out against a silvered dial stamped with a barleycorn motif.