Platinum Ring, Lots of Marks and Pictures.

Trying to identify maker's mark, possibly hallmark, on inside bottom of band. Two symbols clearly discernible: 1.) "ant", two ovals connected with one line; line intersected in three equal lengths; two lines closest to the ovals have another single line radiating off at 45 degree angle, making this symbol resemble an "ant" body and legs. 2.) "painter's palette' shape with one or two "brushes" radiating from center of palette at two-o'clock position. I have inherited this ring and am anxious to discover more information about it origin.

The mounting is a beautiful crown-like shape, the white topaz is nearly five carats. Any informations would be very much appreciated.