[size=medium][size=medium][/size][size=medium][/size][size=large][/size][size=x-larOut of the Whites machines that have ben made which machine or machines are excellent for finding old deep silver coins ? That being said what type of sweep speed is needed to produce satisfactory results with that machine? Also I have a question about how much moisture content will affect metal detecting depth more moisture more depth? Thank -you for your opinions and advise.[/size][/size]