Set Of 6 Napkin Rings Pottery Barn Pewter Finish birds

I don’t believe I ever used these, but the tags are off of them. They do show distress, but that’s how they were made to look like mercury glass on the inside of the one bird there’s a dark mark. I don’t know what it’s from it isn’t the silver chipping off though, super cute you can use for the holidays festive and another lot. I have leaf napkin rings from pottery barn and they go really well together I think.