Anybody Recognize This?

[Fullstock]

Found this in the area I found the sword scabbard throat and mini balls. Most likely a woman's brooch or pin, but it's big and fairly heavy. Thoughts?

 

[Mackaydon]

Are there letters on the arch?
Don.....

 

[Fullstock]

I don't see any Don.

 

[Bruce R]

It's certainly a brooch, you can still see the pin pivot.

 

[tamrock]

Kinda Etruscan revival looking. More than 100 year's old I'm thinking?