The Longines Master Collection Chronograph L2.759.4.78.3 is a self-winding mechanical watch featuring a 42.00 mm stainless steel case and a silver 'barleycorn' dial. It operates at 28,800 vibrations per hour and offers a power reserve of approximately 60 hours. The watch includes a chronograph function with a central 60-second hand, a 30-minute counter at 3 o'clock, and a 12-hour counter at 6 o'clock. Additional features comprise a date display and small seconds at 9 o'clock. The timepiece is water-resistant up to 3 bar and is fitted with a scratch-resistant sapphire crystal. It comes with a brown alligator leather strap secured by a triple safety folding clasp with a push-piece opening mechanism. Reference number: L2.759.4.78.3.