File:2-piece Colchester-Dolphin-Polden Hill type brooch fragment. Front view. (FindID 485092).jpg

English: A fragment of an Early Roman, copper alloy, cast and wrought wire bow brooch. A two-piece Colchester or possibly a dolphin or Polden Hill type. This brooch shows the first improved type of spring fixing using the axis bar. Here it passes through the lower hole of a flat lug protruding behind the head. At the same time the chord had to be fixed to provide a good spring effect so it passed through an upper hole in the same lug. There is a large sping of ten coils, five either side. The wings are plain, except for two londitudinal grooves at each end. There is just a small remnant of the bow with moulded londitudinal ridge decoration. The brooch has little wear, an attractive dark brown patina with light rusty deposit from the water logged ground conditions. The pin has a ninety degree bend but is still quite sharply pointed. This brooch is likely to date from 50-90AD. Ref. Ancient & Romano-British Brooches, R. Hattatt, Dorset Publishing Company 1982, page 66 no. 19 and Ancient Brooches and Other Artefacts, R. Hattatt, Oxbow Books 1989, page 297 fig. 156 & page 301 fig. 160. The brooch fragment is 39.60mm long, 32.12mm wide, 22.00mm thick and weighs 7.5g.