How Old Is My Wedgwood Cameo Bracelet ?

by Debbie
(CA.)

I have a sterling silver cameo bracelet that I received when my great aunt passed away. She was 94 years old. I am not sure what the stone is. It is a darker blue with white in the design.

The cameo subject are men in gowns holding maybe swords and what looks like a thin tree behind or in front of them. It is marked "Wedgwood" with a small mark below the name. Very nice silver work with a safety chain. Any ideas ? I can send a picture if you would like.
Thank You
Debbie