It can be DC. It is more probable, but notice that mine is exactly the same of second on the second line on the photo. Yours is a little bit different. What do you think?
I must admit that the Santa Maria a Monte is a closer match than the example I posted. Of course you may draw your own conclusions.
But to me, the detail of your pendant says 17th Century.
No matter my opinion, it is still a rare and outstand find!