My husband lost his two weeks ago at the park with the kids...it was cold and wet...and muddy, and then the snow fell...
He went past the zurich 'lost and found' today and there were at least 6-8 wedding rings turned in just in January...
Unfortunately, his was not amongst them...
But I'm now noticing lost and found offices all over town! - the railways, the buses and the local council (stadt) all seem to have their systems in place...