Cat pin with unidentified clear hallmark -- pics linked

[kittycaught]

Hi there! I've recently acquired a cat pin with a hallmark that I can't identify, much to my frustration. Any assistance would be appreciated, thanks in advance!

The pin from the front:
http://b.imagehost.org/view/0871/cat.jpg

And the hallmark:
http://b.imagehost.org/view/0871/Cat_sign.jpg

[fatso]

Lovely pin. I can decipher outer ring for you: 925(silver purity sterling class),
Hecho en Mexico( made in Mexico). Now for the experts to tell what's inside.

[kittycaught]

Hello again! I had some luck with this one, my mother found its mark in her Mexican silversmiths book, she says it belongs to a "Gomez" though we haven't been able to find out anything more on it.