Ancients
P. Nerva (113-112 BC). AR brockage denarius (3.95 gm). Rome. ROMA behind, helmeted bust of Roma left, holding spear over shoulder and shield on arm; above, crescent; below chin, denomination mark / As obverse, incuse and reversed. Crawford 292/1. Sydenham 548. Licinia 7. Very rare as a brockage, and unusually nice! Extremely Fine. 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.
Estimate: 250-350 USD