Roman Pannonia, 50 BC - 50 AD, Trumpet Brooch AE trumpet brooch or fibula measuring 29mm, the pin present. For reference, see: Richart Hattatt, Ancient and Romano British Brooches, #77-79. Nigel Mills, Celtic & Roman Artefacts, #RB91,2. Paul Murawski, Benet's Artefacts of England & The United Kingdom, Current Values, #R07-0105 (as a 'bow' brooch).