Found something?
Detectorists and magnet fishers turn up lost things all the time. Before it ends up in a drawer: look at the requests posted in that area, open or closed, from the last twelve months.
Browse shows the requests from the last 12 months, including closed ones, as rough 5 km areas.
Same kind of item, same area, a date that fits. The photos and the description help.
On the request, press "I think I found this" and write what you found and where. The owner gets your note by email.
Browsing needs no account; sending a note needs a free one. Whether a found item must be handed to the authorities depends on the country: check the rules where you are.