About This Watch: This Longines Master Collection Watch L26734783 or L2.673.4.78.3 has a moon phase chronograph (automatic), self winding movement with a month-day window. It features a silver dial and a scratch resistant sapphire crystal. Its finely crafted 40 mm case is made out of stainless steel. This watch is water resistant up to 3 bars; 100 feet; 30 meters.