Mexican Sterling Brooch/Identify Silver Mark

[levidogdebbie]

I have this brooch which appears to be a pirate. I believe the piece to be very old, yet cannot identify the mark. Hopefully the pictures of piece and stamp speak for themselves. Thanks.

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http://s3.supload.com/free/face2.jpg/view/" onclick="window.open(this.href);return false;

Debbie