Triple Diamond? Hallmark on Gold Ring

by Connie
(Camden, TN. USA)

Boy, am I glad I found this site!

I have a gold ring with the following mark. No other mark as to Karat but it does test to be at least 10K.
The silverish part where the stones are set also tests to at least 10K and the stones appear to be garnet.
Can anyone tell me anything about this mark?
Thanks in advance.

Connie