QUOTE(akdrv @ Jun 30 2006, 10:12 AM)
What does "rings well" mean?
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The age old practice of coin dropping, it's practiced alot with hammered coins to ensure they are silver, as the name suggests you raise it about 7" off of a hard surface and drop, if it rings it's silver.
As for forgeries, dunno, i'd be tempted to say yes they'd be easy, but it could easily be harder to forge a coin like that in all honesty, the problem is you have to make the thing actually look 900 years old! And you'd have to be fairly accurate and know which moneyers were at which mints and when. Of course a forger could argue that it's "unrecorded variety", but i'm sure somewhere there's surviving written sources of the period, probably pipe rolls, that could help root out a forgery.
It's a tough one to answer, also Matildine coins generally recieve a fair bit of attention due to their rarity and thus they'd be well checked, over and over, and over again by a squad of dealers probably every time they get sold, most (like this one) came from auction houses and have been bought by dealers, with an auction house certificate (a genuine one at least) you can be 98% sure it's genuine.