L2.773.4.78.3Ref

The Longines Master Collection 42 Chronograph Calendar is built around a 42mm case with a self-winding movement that includes a full calendar, moon phase, and chronograph. Reference L2.773.4.78.3 has a 42.00mm case and Silver dial, shown with the L678.2 caliber; however, L687 or L678 might be used depending on the year of production.