I decided to hunt in the river and stay cool. Didn't find anything notable but a Timex watch in about 4 inches of gravel. It's still running. Based on the crud, corrosion and depth in the bottom it wasn't a new drop.
Next time .....Rolex.
I liked the ad where he attached the watch to a prop on a boat engine. Used to be a Timex museum in Waterbury, CT but it went bust. Wonder where all the watches went......