EGYPT, Alexandria. Nero. AD 54-68. BI Brockage Tetradrachm (23.5mm, 9.88 g, 12h). Uncertain regnal year. Radiate head of Nero right / Incuse of obverse. Cf. K&G 14.78 & RPC I 5275 for obverse type. Toned, porous. VF. Extremely rare, the first brockage error for an Alexandrian tetradrachm that this cataloguer (KKW) can ever recall seeing.