L36 Longines Master Retrograde. Reference L2.7188.8.131.52. Watch measures 41mm and is made from steel. Automatic Longines movement caliber L707 which provides for 48 hours of power reserve. Sapphire crystals on both sides of the case. Waterproof 3ATM or 30 meters. Functions are hours, minutes, retrograde seconds, retrograde day, retrograde date, retrograde 24 hours/second time zone, day/night indicator and moon phase. This watch is fitted with the original brown leather strap with steel double folding clasp. Naturally this watch is complete with the original box and papers dated September 2012. Please be aware that this watch has just returned (January 2021) from Longines for a full service and polishing, making the watch in new condition again with 2 years warranty applicable. Fantastically beautiful and very complicated watch!