File:Roman trumpet brooch (front, reverse) (FindID 251624).jpg

English: An incomplete and heavily corroded cast copper-alloy Roman brooch, probably of trumpet-headed type. Mass: 4.1g; length: 24.7mm; width: 7.5mm; depth: 13.7mm. The brooch consists of a head that is sub-oval in plan attached to a bow that is arched in profile. There is an incomplete lug on the reverse of the head. This would have held the spring and pin mechanism which are missing. There is a pronounced moulding on the bow which consists of three horizontal ribs which run around the bow. The central rib is the most pronounced. Below the moulding, the bow tapers to a point at the base. The lower portion of the bow, the foot, and the catchplate are missing. The bow has an oval cross section. On portions of the brooch, particularly on parts of the head and the smaller ribs on the bow, the surface has a raised brown and green patina. But predominantly, the brooch has a dull, heavily corroded brown and green surface. In "Roman Brooches in Britain: A Technological and Typological Study based on the Richborough Collection", Bayley and Butcher state that trumpet headed brooches, "...are the most original products of the British brooch industry in the Roman period" (2004, p160). The distinctive head is thought to derive from some pre-Roman Aylesford brooches (ibid.). In her "Roman Brooch Timeline", Worrell (2007) dates trumpet brooches to AD75-AD175.