If you take your antiques seriously, make sure you carry a small magnet with you. Ferrous metals are attracted by the item, whereas non-ferrous metals, ie. white metal, lead, brass and copper are not as they are non-ferrous. Many items advertised as brass, copper, cast iron, etc. can easily be identified by using one tiny magnet. I’d be willing and very pleased to discuss these and other similar concerns. Best thing: I’m free and you can decide whether or not to heed my advice.