About This Watch: This Longines Master Collection Watch L25185777 or L2.518.5.77.7 has an automatic, self winding movement with a date window. It features a silver dial with diamonds and a scratch resistant sapphire crystal. Its finely crafted 36 mm case is made out of 18k yellow gold. This watch is water resistant up to 3 bars; 100 feet; 30 meters.