Mexican Silver Circular Tray

[irish046]

I have a silver circular tray that measures 16" in diameter. It has alot of detail work with a raised imprint of the sun god in the center that itself measure 2-3/4". The raised edge of the tray is approximately 2-1/4" wide. On the back of the tray I found the following engraving:

0925 VIGUERAS MADE
IN
MEXICO

The 0925 is actually engraved upside down.

Any information would be appreciated. Thank you.