picked up two billon tetradrachms recently, my first trajan decius and my first nero!

Nero.
54-68 AD.
Billon Tetradrachm
Alexandria
Dated year 10 (63/4 AD).
Obv.: radiate head right.
Rev.: draped bust of Serapis right, wearing calathus; LI in lower right field.
Milne 222,
25 mm, 13.4g

Trajanus Decius
249-251 AD
SYRIA. Seleucis and Pieria. Antioch.
Billon Tetradrachm.
Obv: AYTOK K Gamma;AI ME KYIN Delta;EKKIOC CEB.
Laureate, draped and cuirassed bust right.
Rev: Delta;HMAPX EXi;OYCIAC / S C.
Eagle standing left on palm branch.
Prieur 500
27 mm
11.8 g