A rare Etruscan gold "sanguisuga" or "leech"-type fibula with a arched bow and a twisted wire safety pin which fits into an elongated cylindrical catch-plate . This type of fibula was worn primarily by females.
Etruscan. Circa 8th - 7th century B.C.
Dimensions: length 3,7cm ; height (of the bow) 1,7cm ; weight 2,67 grammes
A similar - but more ornate - example can be found in the collection of the Metropolitan Museum of Art (accession number 31.11.1) : https://www.metmuseum.org/art/collection/search/253339