Lost vintage wristwatch with brown leather band and silver face with Roman numerals near Gray's Lake Park, Des Moines.

I lost my grandfather's vintage wristwatch while walking in Gray's Lake Park in Des Moines last Saturday. It has a brown leather band and a silver face with Roman numerals. I was taking pictures near the water and realized it was missing afterward. It means a lot to me, and I’d really appreciate any help in finding it!