The product is a Roman-Gallic Empire double-denarius coin featuring the ruler Postumus, minted in the period AD 260-269. The coin is composed of billon with a fineness of 0.18 silver, making it a valuable and historically significant piece for collectors. It has been certified by NGC and is in a cleaned state, ensuring its authenticity and quality. This coin showcases the intricate design and craftsmanship of ancient Roman imperial coins, offering a glimpse into the history and politics of the time.