What to do with my deceased dads Rolex watch?

When retiring as a Chief Electrician at a big company, my dad was given a gold Rolex watch. It’s the real deal. Its been willed to me. I have no intentions of getting rid of it. My only problem is who to will it to, in my family. Honestly, some of my relatives would not take care of the watch and this concerns me. My son would love to have the watch, but he lives near the ocean and this also concerns me. Not the water, but he might lose it at the beach. Other relatives were not that close to my dad, so that’s out. Question: What’s your suggestion for the willing of this watch?