FIBULA? PENANNULAR?
A fibula (Latin "to fasten") is used in modern languages to describe the many types of Roman and Early Medieval brooches with pins and catches behind the main face of the brooch. This simple design looks like a modern safety pin.
Annular means ring-shaped and penannular is an incomplete ring. Small and simple penannular brooches in bronze, iron and, rarely, silver were common in the Roman period as a practical fastener. Highly ornate Celtic brooches of precious metal were worn by the elite of Scotland and Ireland circa 700 to 900.
A fibula (Latin "to fasten") is used in modern languages to describe the many types of Roman and Early Medieval brooches with pins and catches behind the main face of the brooch. This simple design looks like a modern safety pin.
Annular means ring-shaped and penannular is an incomplete ring. Small and simple penannular brooches in bronze, iron and, rarely, silver were common in the Roman period as a practical fastener. Highly ornate Celtic brooches of precious metal were worn by the elite of Scotland and Ireland circa 700 to 900.
HOW TO FASTEN A PENANNULAR BROOCH