Hey :) I can't find this ring's purity mark...

by Mia Huang
(Taipei, Taiwan)

I brought this ring lately, and after I google it, I think this ring's first mark is "I o" then next is "Victia" head's mark , next is a "lion" I believe , last one is letter is "D" represent 1839.

So don't know where is the purity mark? Can you help me find it?
I try my best to take some photos but it's difficult to make it just right, hope it will help.