This is a genuine Baume & Mercier Malibu steel watch strap link. Your link is in good condition, is 18mm wide and it comes complete with the original screw required to attach it into your watch strap.

I have given you photos of your link from every angle. Please use them to add to this description.

If you are not sure if this will fit your watch or if you have any other questions then message me. I'm here to help you.