I think it's part of a bottle cap. The kind that pops open like on Flensburg bottles. I've found a few of them, including the porcelain lid with the metal pieces. Unfortunately, you can't add photos to the comments, can you?
I'm not sure about the closure, I might have to add another photo from the side. Attaching images isn't possible but you can post the link to the image.
SondelSuechtig 23.5.2024
Here as a reference: VT-3U6N6TC6 Just uploaded. I also found the individual pieces connected with wire. I'll post photos of this at the weekend. It's simply a swing top from a bottle
Jan 23.5.2024
Indeed, it looks very much like it! Thank you for the upload, another mystery solved 👍