Sterling Mexico Snake Earrings- manufacturer?

Thrift shop find, I do see they are signed Mexico on the top and 925 on the bottom, but I can't figure out the hallmark in the middle. I love their funny faces and the ends of their tails!

 

Can you get a clearer pic. Looks like it’s the registration which will be two letters-first is city and second is last initial of the artist. The number after the hyphen is the number of the filing. E.G. TC-44 would represent the 44th artist whose last name began with a C to register in Taxco. So many unattributed artists but I’m happy to look and see if there’s anything in Hougart’s if you can post the code. That code started in 1979.

 

Thank you. I will try to get a better picture.

 

I can't read it either; the fact that it's only half there doesn't help.

 

If you’re selling them online I think you’ll be fine with Vintage Mexico Sterling Silver 925 Snake Earrings Posts Signed. They’ll get attention with that title.