The motif shows a Praefectus Castrorum, a high-ranking officer of the Roman military, in full armour. His breastplate is adorned with golden decorations and medallions, while a red toga emphasises his authority. The helmet with its striking red plume gives him an imposing appearance. His gaze is determined and a short sword hangs at his side, ready to hand. The dark, textured background and the Latin inscription "Praefectus Castrorum" reinforce the historical and military atmosphere.