Ave!
The very first thing when it
comes silvered coins is to determine whether it's "silver
plated" or "silver tinned".
The first example is a Silver
Plated fourree; Note how the
obverse has buckled up. Too easy to see.
The next example features a pair of Vine Leaf vessel adornments. Looks like silver but it just simply solder used to attach it to a copper
alloy wine vessel.
Is it gold
plated or just oxidized
silvering? Yes, in this case the artifact was gold
plated.
Too many coin cleaners have a
bit of confusion when it
comes silver tinned coins. In most cases the
silvering appears just a
bit dull, as seen in the next example below.
All the yellow-looking bits are the
silvering.