Need help identifying a hallmark

Hey all! Stoked to discover this site... I LOVE antiques!

I’ve been trying to find some information on a ring I’ve owned for a few years. It’s stamped 10k and what appears to be a tiny key? The previous owner said it had belonged to her aunt in Europe (she was an older lady.)
For the life of me, I can’t find any information on a key hallmark.
Any thoughts?
Sorry about the poor picture, it’s the best I could get!

 

Greetings! I'm sure any number of members would love to help. But first, we'll need the picture to be larger. Not the whole thing, but the part with the mark inside it.

It would also be nice to know what you would like to be called. Can't make a name out of that string of characters.

 

I enlarged the mark but it is still too fuzzy for my eyes. Maybe someone else can see something.

 

Thanks for trying, MillCove. I can't see details either. Can't even see the "key" that the OP says is there.

 

Hard to say. What I "see" over there is a dot and a letter - either K or X.

 

Hi guys! Thanks for trying;
My username is Freak Out- regular 1337 haha

 

hmmm, I’ll try to get a better view of it/better picture/ better light...
as far as I can tell, it looks like 10k and a single tiny sideways key