Ancients
Julia Maesa (Augusta, AD 218-224/5). AR brockage denarius (2.90 gm). NGC Choice XF★ 3/5 - 4/5, brockage. Rome, under Severus Alexander, AD 223/4. IVLIA MAESA AVG, draped bust of Maesa right / As obverse, incuse and reversed. RIC --; RSC --, cf. RSC 8 (similar hairstyle, Fecunditas reverse). Extremely rare as a brockage!
A brockage is a mint error that occurs when a coin becomes stuck in the obverse or reverse die, thus becoming the corresponding "die" for the next coin struck. The result is a coin with one side in proper relief, but the other side bearing the identical image, only reversed and incuse.
HID02901242017
Estimate: 150-200 USD