This coin from the era of Diocletian, ruler of the Roman Empire from 284-305 AD, is a beautiful example of an Antoninianus made of bronze. Measuring 20mm in diameter, this coin depicts the historical period of Roman Imperial rule and is a valuable addition to any collection. While certification is uncertain, the quality of this coin gives evidence of its authenticity. Guaranteed authentic by Poor Richards Coins & Collectibles; where history comes to life!