Need help identifying mark on Mexico Sterling Bracelet

[eamackey]

I have a beautiful sterling bracelet with inlaid abalone that I can't seem to find the hallmark anywhere. Has anyone ever seen this mark before or know who made it?

Thanks in advance! :)

http://eamackey.myweb.uga.edu/SB14.jpg
(admin photo edit - image too large - link only - see Guidelines)