the two discs upper left (the god Jupiter Amon) and far right (god Janus) are attached to two silver torcs, added bravery awads.
Centurions often affixed their military focale to these to high light that he had two of the prized awards, they could be small or large, gold or silver.

Between the two top discs is Herac(k)les battling the Nemean Lion and the middle disc is the Gorgon Medusa (common central motif on Roman high officer’s Lorica Musculata for hundreds of years) Above Medusa are two mythical Roman Capricorns that are linked to Augustus and bottom left is the Emperor Nero. The middle bottom is the Emperor Tiberius standing over his dead enemies. Above Nero, appropriately is a mighty Roman Aquila (eagle) spreading its wings – a symbol of Rome itself.