If you are hunting in discriminate mode (coins, relics, jewellery etc) and you get an iffy signal, deep and and that ID cursor sometimes going to the coins area, quickly flip over to true all metal mode and see where it ID's on the screen. If it reads in the iron range, it's probably junk. If it reads in the coins area on the screen, and is size "B" or size "C".....dig it! It could be a nice old silver or copper coin.
The TRUE ALL METAL MODE seems to do an excellent job separating old coins from the junk.
The TRUE ALL METAL MODE seems to do an excellent job separating old coins from the junk.