The Longines PrimaLuna L8.123.4.97.6 showcases a luminous blue mother-of-pearl dial set with 15 Top Wesselton VS-SI diamonds, for a total of 0.057 carats, with diamond indexes and silvered polished hands. This 30 mm stainless steel watch is water-resistant to 3 bar and powered by automatic calibre L592.5, a self-winding mechanical movement beating at 28'800 vibrations per hour with a monocrystalline silicon balance-spring and a power reserve up to 45 hours. Scratch-resistant sapphire crystal wit...