I recently took out a chain that was given to me as a gift a long time ago, and I never really paid much attention to it until now. I tried to identify what it is, and I've reached the point of saying it's 'c15' (I think, based on the picture). However, I'm having trouble deciphering what is on the left side of the mark. Does anyone here happen to know?
Sorry if the shot is bad
Thank you
![Image](https://i.ibb.co/zSGBntK/mark.jpg)