The Longines Master ref: L2.673.4.78.6 features a stainless steel case with a 40mm diameter. It is powered by the Longines caliber L678.2, which offers automatic winding. The watch displays a beige dial and includes functions such as a 24-hour indication, date, month, chronograph, and moonphase. This model combines practical features with a classic design, making it suitable for various occasions.