This is circa early 1900s 800 silver brooch is an excellent example of the Homeric or Etruscan Revival Roman coins style jewelry popular during the late 1800s and on into the early 1900s. This particular brooch is marked only 800 for silver content on the back. It was made to resemble a stamped ancient Roman coin, with the head of a helmeted figure facing to the viewer's right in the middle, circled by a row of raised dots, and with a rope border around the outer edge. The outer edge has been purposefully given 2 splits to further imitate an ancient hand struck coin. The back has a pin stem and roll over safety catch. Due to the 20th century type of clasp I am dating this brooch to sometime in the early 1900s when this type of clasp first came into use. The 800 content makes me suspect that this may have been made in Italy or another European country where 800 silver use was the norm.
This brooch measure 1.375" in diameter. It weighs 8.7 gr.
Condition is good, with expected patina.
If you love the look of ancient Roman jewelry, this early 1900s version can give you the appearance without the heftier price tag of an actual ancient piece.