The Longines Master Collection L2.673.5.78.7 is a men's automatic watch featuring a 40mm stainless steel case with 18k yellow gold accents. The white dial displays Arabic numerals and blue hands, complemented by a moon phase indicator at 6 o'clock, a 24-hour subdial at 9 o'clock, and a day and month display at 12 o'clock. Powered by the Longines Caliber L678 movement, it offers a 46-hour power reserve. The watch is completed with a stainless steel and 18k gold bracelet and is water-resistant up to 30 meters. Reference number: L2.673.5.78.7.