Black & White Cats Pendant 'Ying & Yang' & A Two Row Silver-Tone Necklace

The kitty pendant has a hallmark on the back but I'm not familiar with it. This is a fashion piece. The pendant is on a pull-over manmade cord that is adjustable. The silver-tone metal two row necklace has a lobster claw closure. This is also a fashion necklace. I put the two together for value & I think they look nice together.