Longines Hydro Conquest Watch

It is the 39mm model with the black face. Stainless steel, sapphire crystal glass, screw in crown, date and rotating bezel. The numbers on the back are: L3.604.4 and 40199963. The number on the band is L600123774. This watch was worn by me for less than a year. It does have minor scratches on the band, from normal wear, but the face is completely scratch free. Unfortunately I do not have the box/paperwork as it was a gift from my ex wife and I never got it back after our separation. I will fully guarantee the authenticity of this watch and have included pictures of the serial number, model number and band number. This is why I am listing it so low.