There was over 36 million Cupro-nickel ones issued and about 377000 sterling silver ones, so your coin(s) might be silver, but are much more likely to be cupro-nickel alloy.
How to tell if they are silver or not...
http://answers.yahoo....20060801193500AAlizh1
(as a side note, there is no need to post a new question for this, just add the extra info as an answer to your original question, or at the very least include all the info again in the new question, as this one makes no sense on it's own)