L30 Longines HydroConquest. Reference L3.7188.8.131.52. Watch measures a decent 39mm and is made from steel. Automatic Longines movement base caliber ETA. 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 bracelet with integrated folding clasp with dive suit extension and security link. Naturally this watch is complete with the original box and papers dated January 2018. Please be aware that this watch has just been serviced and polished. Great activity watch good for every day!