155 NGC Ch VF Antoninus Pius Roman Empire Denarius Hybrid Mule Mint Error Pax (21090803C)Choice Very Fine Emperor Antoninus Pius Roman Empire silver denarius coin. Rare, apparently unpublished muling of obverse and reverse dies that BOTH have TR P XIX date, issued 155 56 CE. Reference RIC 246 for obverse dating & RIC 252 for reverse dating. Roman denarii of Antoninus Pius typically have a TR P date on either of obverse or reverse, but NOT both. This is an example of an error pairing (muling) of dies likely from different mint workshops