The Dacian war trumpet shown on the Roman Emperor Trajan's column.
<a href="https://en.wikipedia.org/wiki/John_Hungerford_Pollen_(senior)" class="extiw" title="w:John Hungerford Pollen (senior)">John Hungerford Pollen (senior)</a> (1820-1902)
A reproduction from the <a href="https://en.wikipedia.org/wiki/Trajan%27s_Column" class="extiw" title="w:Trajan's Column">Trajan Column</a> (2nd century) in the 1874 book <i>A Description of the Trajan Column</i>