Authentic Cartier Love ring?

[dogue]

I am not familiar with a lot of the older markings. The photos don't show the Italian factory cartouche well. They don't look like cheap fakes. They may be real, but I'm not sure.

I also have another photo that might be useful @m51galaxy

 

[m51galaxy]

I also have another photo that might be useful @m51galaxy

It looks like it may be * 1 TO , which is a valid factory in Italy, it probably is real, but, I'm still not sure about the older pieces.

 

[gee30]

Hi. This hallmark looks questionable to me. Can someone please help determine? The seller says it is authentic but that’s what they all say.