L23 Longines HydroConquest. Reference L3.640.4. Watch measures 40mm and is made from steel. Swiss high precision Quartz movement by Longines/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 if fitted with the original full length steel bracelet with integrated folding clasp with security link. Naturally this watch is complete with the original box and papers dated October 2011. Please be aware that this watch has just been serviced with a new battery and has been polished. It is a pre-owned watch so there are some marks on the bezel but otherwise this watch is in great condition. A very rare HydroConquest with the silver dial!