CONDVL18 Longines HydroConquest Ceramic. Reference L3.7188.8.131.52. Watch measures a cool 43mm and is made from black ceramic. Automatic Longines movement caliber L888 which provides for 64 hours of power reserve. Sapphire crystal on the front and a closed case back. Waterproof 30ATM or 300 meters. Functions are hours, minutes, sweep seconds and date. This watch is fitted with the original black rubber strap with folding clasp. Naturally this watch is complete with the original box and papers dated upon purchase. Fantastic watch in full ceramic and still rare to find!