L18 Longines HydroConquest. Reference L3.6184.108.40.206. Watch measures 41mm and is made from steel. Automatic Longines movement caliber L633. 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 full length steel bracelet with integrated folding clasp. Naturally this watch is complete with the original box and (open) papers. A classic and fantastic all-day watch!